CN113655738A - Control system and control method of POC indicator lamp - Google Patents
Control system and control method of POC indicator lamp Download PDFInfo
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- G05B19/00—Programme-control systems
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- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
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Abstract
The utility model relates to a control system and control method of POC pilot lamp, wherein, the control system of POC pilot lamp includes that the control system of POC pilot lamp includes time delay module, switch module, keeps the module and points the lamp module, and the switch module is connected with time delay module, keeps the module and points the lamp module electricity respectively, keeps the module still to be connected with the module electricity of lighting a lamp, and the module of lighting a lamp and time delay module still are connected with the main control unit electricity of equipment respectively. By the method and the device, the problem that conflict exists between the control logic of the indicator light and the control logic of the POC in the system design in the related technology is solved, normal lighting logic control is guaranteed, control logic confusion occurring at the initial stage of system starting is avoided, and the beneficial effects of mutual independent execution of POC identification and lighting control are realized.
Description
Technical Field
The present application relates to the field of signal processing and control, and in particular, to a system and a method for controlling a POC indicator light.
Background
The indicator light is applied to a plurality of devices, the camera is almost provided with the indicator light, and the camera usually adopts DSP and PHY to control the indicator light. However, in the embedded system in the field of cameras, the indicator light is often controlled through a power-on detection pin (POC pin), and after the embedded system is started, the power-on detection pin is configured to be used as a GPIO pin, so that the indicator light is logically controlled.
However, in the field of video cameras, there is a conflict between the control logic of the indicator lights and the POC of the system design, for example: the system circuit is set to allow high-level lighting, but the hardware configuration of the power-on detection pin is low, so that the POC pin cannot be used for lighting control or the problem of disordered control logic of the indicator light occurs.
At present, no effective solution is provided for the problem that the control logics of the indicator light and the POC of the system design in the related art conflict.
Disclosure of Invention
The embodiment of the application provides a control system and a control method of a POC indicator light, which are used for solving the problem that the conflict exists between the control logic of the POC indicator light and the control logic of the POC in the system design in the related technology.
In a first aspect, an embodiment of the present application provides a control system of a POC indicator, including a delay module, a switch module, a holding module, and a lighting module, where the switch module is electrically connected to the delay module, the holding module, and the lighting module, the holding module is further electrically connected to the lighting module, the lighting module and the delay module are further electrically connected to a main control unit of a device, respectively, where the main control unit is configured to output a reset pull-up signal and a POC control signal; the delay module is at least used for delaying the reset pull-up signal by a preset delay time and transmitting the delayed reset pull-up signal to the switch module, wherein the preset delay time is not less than the time required by the main control unit for POC (point of sale) identification; the switch module is at least used for generating a turn-off signal and transmitting the turn-off signal to the lighting module when receiving the reset pull-up signal; the holding module is configured to maintain the control end of the lighting module to receive a preset level within a first preset duration after the POC identification is completed by the main control unit, and to keep the control end of the lighting module to receive the POC control signal with a correct level in a POC identification stage performed by the main control unit, where the control end of the lighting module is a POC signal configuration end of the lighting module; the lighting module is used for turning off the POC indicator lamp when receiving the turn-off signal, and/or driving the POC indicator lamp to be on or off according to the level of the control end of the lighting module.
In some embodiments, the holding module includes a first holding unit, the first holding unit includes a first port, a second port and a third port, the first port is electrically connected to the electrical connection point of the switch module and the lighting module, the second port is connected to the control terminal of the lighting module, and the third port is grounded, wherein the first holding unit is configured to connect the second port and the third port for the first preset duration, and maintain the second port and the third port disconnected during the POC identification phase of the main control unit; the control end of the lighting module is connected to the preset level under the condition that the second port is connected with the third port, and receives the POC control signal with correct level under the condition that the second port is disconnected with the third port.
In some embodiments, the first holding unit includes a first switch tube, a first resistor, a second resistor, and a third resistor, the first switch tube includes a first control terminal, a first input terminal, and a first output terminal, the first control terminal is connected to the first port in series with the first resistor, the first input terminal is connected to the second resistor, the first output terminal is grounded, the other end of the second resistor is connected to the second port and the third resistor, and the other end of the third resistor is connected to a first power supply; the first switch tube is used for connecting or disconnecting the first input end and the first output end according to a first level received by the first control end; and when the first input end is connected with the first output end, the control end of the lighting module is connected with the preset level, and receives the POC control signal with correct level under the condition that the first input end is disconnected with the first output end.
In some embodiments, the delay module includes a delay unit, an input end of the delay unit is connected to the main control unit, and an output end of the delay unit is connected to the switch module, where the delay unit is at least configured to delay the reset pull-up signal by the preset delay time.
In some of these embodiments, the delay comprises a time relay.
In some embodiments, the delay module includes an RC delay circuit, an input end of the RC delay circuit is connected to the main control unit, an output end of the RC delay circuit is connected to the switch module, and the RC delay circuit is configured to delay the reset pull-up signal by the preset delay time.
In some embodiments, the switch module includes a switch circuit unit, the switch circuit unit includes a fourth port, a fifth port and a sixth port, the fourth port is connected to the output end of the delay module, the fifth port is electrically connected to the lighting module and the holding module, and the sixth port is connected to a first preset level, wherein the switch circuit unit is at least used for disconnecting the fifth port and the sixth port when the fourth port receives the reset pull-up signal; the lighting module is used for turning off the POC indicator lamp when the fifth port and the sixth port are disconnected.
In some embodiments, the switch circuit unit includes a second switch tube, the second switch tube includes a second control terminal, a second input terminal and a second output terminal, the second control terminal is electrically connected to the fourth port, the second input terminal is electrically connected to the fifth port, and the second output terminal is grounded, wherein the second switch tube is at least used for controlling the second input terminal and the second output terminal to be disconnected when receiving the reset pull-up signal; the lighting module is used for turning off the POC indicator lamp when the second input end and the second output end are disconnected.
In some embodiments, the lighting module includes a first switch unit, an input terminal of the first switch unit is connected to the POC indicator lamp, a control terminal of the first switch unit is electrically connected to a control terminal of the lighting module, and an output terminal of the first switch unit is grounded, where the first switch unit is configured to output a first voltage according to a level of the control terminal of the first switch unit; the POC indicator lamp is used for being switched in the first voltage and emitting light when the first voltage is within a first set voltage value range.
In some embodiments, the first switch unit includes a third switch tube, the third switch tube includes a third control terminal, a third input terminal, and a third output terminal, the third control terminal is connected to the control terminal of the lighting module, the third input terminal is connected to the POC indicator lamp, the third input terminal is further connected to a first power supply through a series fifth resistor, and the third output terminal is grounded, where the third switch tube is configured to connect or disconnect the third input terminal and the third output terminal according to a level of the third control terminal, and control the third input terminal to generate the first voltage.
In a second aspect, an embodiment of the present application provides a control method for a control system using the POC indicator light described in the first aspect, where the control method includes: the delay module delays the reset pull-up signal by a preset delay time and then transmits the reset pull-up signal to the switch module; the switch module generates a turn-off signal and transmits the turn-off signal to the lighting module when receiving the reset pull-up signal; the holding module maintains the control end of the lighting module to receive a preset level within a first preset time after the main control unit finishes POC identification, and keeps the control end of the lighting module to receive the POC control signal with correct level in a POC identification stage of the main control unit; and the lighting module extinguishes the POC indicator lamp when receiving the turn-off signal, and/or drives the POC indicator lamp to be on or off according to the level of the control end of the lighting module.
Compared with the related art, the control system and the control method of the POC indicator lamp provided by the embodiment of the application comprise a delay module, a switch module, a holding module and a lighting module, wherein the switch module is respectively and electrically connected with the delay module, the holding module and the lighting module; the main control unit is used for outputting a reset pull-up signal and a POC control signal, and the delay module is at least used for delaying the reset pull-up signal by a preset delay time and then transmitting the delayed reset pull-up signal to the switch module; the switch module is at least used for generating a turn-off signal and transmitting the turn-off signal to the lighting module when the reset pull-up signal is not received; the holding module is used for keeping the control end of the lighting module to receive the preset level within a first preset time after the main control unit finishes the POC identification, and keeping the control end of the lighting module to receive the POC control signal with correct level in the POC identification stage of the main control unit; the lighting module is used for turning off the POC indicator lamp when receiving the turn-off signal, and/or driving the POC indicator lamp to be on or off according to the level of the control end of the lighting module. By the method and the device, the problem that conflict exists between the control logic of the indicator light and the control logic of the POC in the system design in the related technology is solved, normal lighting logic control is guaranteed, control logic confusion occurring at the initial stage of system starting is avoided, and the beneficial effects of mutual independent execution of POC identification and lighting control are realized.
The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the application.
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 application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a block diagram of a control system of a POC indicator light according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a switch module, a holding module and a lighting module of a POC indicator control system according to an embodiment of the present application;
FIG. 3 is a topological circuit diagram of a retention module of a control system of a POC indicator light according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a switch module and a delay module of a POC indicator light control system according to an embodiment of the present application;
FIG. 5 is a topological circuit diagram of a delay module of a control system of a POC indicator light according to an embodiment of the present application;
fig. 6 is a schematic structural diagram illustrating connection of a delay module, a switch module and a lighting module of a POC indicator control system according to an embodiment of the present application;
FIG. 7 is a topological circuit diagram of a switch module of a control system of a POC indicator light according to an embodiment of the present application;
fig. 8 is a topological circuit diagram of a POC indicator light control system according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application.
It is obvious that the drawings in the following description are only examples or embodiments of the present application, and that it is also possible for a person skilled in the art to apply the present application to other similar contexts on the basis of these drawings without inventive effort. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as referred to herein means two or more. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.
The present embodiment provides a POC indicating lamp control system, fig. 1 is a block diagram of a POC indicating lamp control system according to an embodiment of the present application, as shown in fig. 1, the POC indicating lamp control system includes a delay module 100, a switch module 200, a holding module 300 and a lighting module 400, the switch module 200 is electrically connected to the delay module 100, the holding module 300 and the lighting module 400 respectively, the holding module 300 is further electrically connected to the lighting module 400, the lighting module 400 and the delay module 100 are further electrically connected to a main control unit (not shown in the drawings) of the device respectively (the main control unit is configured to output a control signal, wherein the control signal includes a software POC configuration signal and a reset pull-up signal), wherein,
the main control unit is used for outputting a reset pull-up signal and a POC control signal.
In this embodiment, the reset pull-up signal is a system reset signal, the system is reset at a low level, and the system receives a high level enable when the reset signal is pulled up; the POC control signal corresponds to a software POC configuration signal for lighting control.
The delay module 100 is at least configured to delay the reset pull-up signal by a preset delay time and transmit the delay time to the switch module 200, where the preset delay time is not less than a time required by the main control unit for POC identification.
In this embodiment, the delay module 100 delays the received reset pull-up signal (refer to SYS _ RST in fig. 1), so that the switch module 200 is not turned off and controls the lighting module 400 not to be turned on during the period of time when the POC identification is completed by the main control unit; by delaying, the reset signal needs to be pulled high in the stage of skipping POC identification, so that when the reset pull-up signal is transmitted to the switch module 200, the system has already completed POC identification, and at this time, the switch module 200 receives the corresponding reset pull-up signal and turns on the lighting module 400.
The switch module 200 is at least configured to generate a turn-off signal and transmit the turn-off signal to the lighting module 400 when the reset pull-up signal is not received.
In this embodiment, during the reset pull-down and POC identification processes, the switch module 200 is in an off state, the lighting module 400 is turned off, and the POC indicator lamps controlled by the lighting module 400 are all in an off state, after the delay time is over, the switch module 200 receives the reset pull-up signal, the switch module 200 is enabled to be started, the lighting module 400 is also turned on, and then the lighting module 400 is controlled by the POC configuration level output by the main control unit, that is, controlled according to the lighting logic.
The holding module 300 is configured to maintain the receiving preset level of the control end of the lighting module 400 within the first preset duration after the POC identification is completed by the main control unit, and to hold the control end of the lighting module 400 to receive the POC control signal with the correct level in the POC identification phase of the main control unit, where the control end of the lighting module 400 is the POC signal configuration end of the lighting module 400.
In this embodiment, the system correspondingly performs the initialized POC configuration within the first preset duration after the POC identification is completed, the POC configuration is different from the software POC configuration corresponding to the lighting logic in this embodiment, the software POC configuration is controllable, but the POC configuration corresponding to the initialized configuration includes the software and hardware configurations POC corresponding to the system, since the initialized POC configuration is the POC configuration within the system, the control cannot be modified by the software setting, and meanwhile, the level corresponding to the initialized POC configuration conflicts with the level corresponding to the lighting logic, therefore, in this embodiment, the level of the control end of the lighting module 400 corresponds to the level of the preset lighting state through the holding module 300 within the first preset duration after the POC identification is completed, for example: in the POC configuration initialization stage, the level of the POC signal received by the controller of the lighting module 400 can drive the lighting module 400 to light, but the lighting logic of the system design is as follows: in this state or time period, the lighting module 400 does not start lighting, and the level of the control terminal of the lighting module 400 cannot drive the lighting module 400 to start lighting by the holding module 400.
In this embodiment, the period corresponding to the preset delay time at least includes a POC identification stage of the system, in this embodiment, in the period corresponding to the preset delay time, the holding module 300 enables the control end of the lighting module 400 to receive the POC control signal with correct level, for example: in the POC identification stage, the lighting module 400 is not lit up due to the level of the POC control signal received by the control terminal of the lighting module 400.
The lighting module 400 is configured to turn off the POC indicator when receiving the turn-off signal, and/or drive the POC indicator to turn on or turn off according to a level of a control terminal of the lighting module 400.
In this embodiment, the control terminal corresponding to the lighting module 400 receiving the POC control signal is a POC signal configuration terminal, and the terminals corresponding to the switch module 200 and the holding module 300 are switch terminals at least for receiving the turn-off signal; when the lighting module 400 receives the turn-off signal, the POC indicator lamp is turned off; after the delay is over, the switch module 200 is in the on state, the switch end of the lighting module 400 correspondingly receives the start signal, the lighting module 400 is turned on, and the POC indicator is controlled according to the level configured by the normal POC.
In the POC indicator light control system in this embodiment, after the system is started, the control operation is performed according to the normal POC configuration level, the operation state of the lighting module 400 is not related to the switch module 200 or the holding module 300, or the lighting module 400 is driven by the reset pull-up signal to be continuously turned on, for example: when the POC pull-down high level is used for lighting (the POC control terminal is connected to the anode of the POC indicator), the cathode of the POC indicator of the lighting module 400 is grounded, and the lighting module 400 is turned on according to the pull-up or pull-down condition of the POC.
Fig. 2 is a schematic structural diagram of the connection between the switch module, the holding module and the lighting module of the POC indicator control system according to the embodiment of the present application, as shown in fig. 2, the holding module 300 includes a first holding unit 301, the first holding unit 301 includes a first port, a second port and a third port, the first port is connected to an electrical connection point between the switch module 200 and the lighting module 400, the second port is connected to the control terminal of the lighting module 400, and the third port is grounded, wherein,
the first keeping unit 301 is configured to connect the second port and the third port within a first preset duration, and keep the second port and the third port disconnected during the POC identification phase performed by the main control unit.
The control terminal of the lighting module 400 is switched in the preset level when the second port is connected to the third port, and receives the correct POC control signal (corresponding to the POC in fig. 2) when the second port is disconnected from the third port.
In this embodiment, in a first preset duration after the POC identification is completed, the first holding unit 301 maintains the connection between the second port and the third port, the control terminal of the lighting module 400 is pulled down, and the control terminal of the lighting module 400 is connected to a preset level, so that the level of the control terminal of the lighting module 400 corresponds to the level of the preset lighting state, and the lighting module 400 does not start lighting.
In this embodiment, in the period corresponding to the preset delay duration, the first holding unit 301 maintains the second port and the third port disconnected, the control terminal of the lighting module 400 is not pulled low, the control terminal of the lighting module 400 receives the POC control signal, and during this period, the lighting module 400 does not light according to the set level of the POC control signal corresponding to the POC identification stage, for example: the level of the POC control signal corresponding to the POC identification stage is low level, and the control terminal of the lighting module 400 receives the low level POC control signal without lighting.
It should be noted that, during the first preset time period after the POC identification is completed, the first holding unit 301 maintains the connection between the second port and the third port, and the level of the control terminal of the lighting module 400 is associated with the accessed or configured POC signal.
It should be understood that, by configuring the first holding unit 301, the holding module 300 can receive the POC control signal with the correct level output by the main control unit at the control end of the lighting module 400 during the POC identification phase performed by the main control unit, and maintain the control end of the lighting module 400 to access the preset level within the first preset duration after the POC identification is completed by the main control unit.
Fig. 3 is a topological circuit diagram of a holding module of a control system of a POC indicator lamp according to an embodiment of the present application, and as shown in fig. 3, the first holding unit 301 includes a first switch Q1, a first resistor R1, a second resistor R2 and a third resistor R3, the first switch Q1 includes a first control terminal, a first input terminal and a first output terminal, the first control terminal is connected in series with the first resistor R1 to a first port (corresponding to an electrical connection point between the switch module 200 and the lighting module 400), the first input terminal is connected with the second resistor R2, the first output terminal is grounded, the other end of the second resistor R2 is connected to a second port (corresponding to a control terminal of the lighting module 400) and the third resistor R3, and the other end of the third resistor R3 is connected with a first power VCC; wherein,
the first switch tube Q1 is used for connecting or disconnecting the first input end and the first output end according to the first level received by the first control end.
In this embodiment, the first level is determined according to the on and off states of the switch module 200, when the switch module 200 is turned on, the lighting module 400 is turned on, the first level is a low level, when the switch module 200 is turned off, the lighting module 400 is turned off, and the first level is a difference between the anode voltage of the POC indicator and the tube voltage drop of the POC indicator.
The control terminal of the lighting module 400 is connected to the preset level when the first input terminal is connected to the first output terminal, and receives the POC control signal with the correct level when the first input terminal is disconnected from the first output terminal.
In this embodiment, during a first preset time period after the POC identification is completed, the first switch Q1 connects the first control terminal and the first output terminal, the control terminal of the lighting module 400 is pulled low, and the control terminal of the lighting module 400 is connected to a preset level (corresponding to maintaining the lighting module 400 in a normal operating state), so that the level of the control terminal of the lighting module 400 corresponds to the level of the preset lighting state.
In this embodiment, during the POC identification period, the first switch Q1 switches off the first control terminal and the first output terminal, the control terminal of the lighting module 400 is not pulled low, the control terminal of the lighting module 400 receives the POC control signal, and during this period, the lighting module 400 does not light according to the set level of the POC control signal corresponding to the POC identification period, for example: the level of the POC control signal corresponding to the POC identification stage is low level, and the control terminal of the lighting module 400 receives the low level POC control signal without lighting.
It should be noted that the first switching transistor Q1 in the embodiment of the present application includes, but is not limited to, a triode or a MOS transistor. Moreover, according to the disclosure of the present application, a person skilled in the art can easily think that the corresponding holding unit disclosed in the present application is modified into a holding unit adapted to the selection of the switching tube according to the specific selection of the switching tube, so that the present application can be implemented whether the switching tube is an NPN-type or PNP-type triode, or an N-channel or P-channel switching MOS tube, and the present application is not limited in the embodiments.
Fig. 4 is a schematic structural diagram illustrating a connection between a switch module and a delay module of a POC indicator control system according to an embodiment of the present disclosure, as shown in fig. 4, the delay module 100 includes a delay 101, an input end of the delay 101 is connected to a main control unit, and an output end of the delay 101 is connected to a switch module 200, where the delay 101 is at least used for delaying a reset pull-up signal by a preset delay duration.
In some of these alternative embodiments, the delay 101 includes, but is not limited to, a time relay.
Fig. 5 is a topological circuit diagram of a delay module of a POC indicator light control system according to an embodiment of the present application, and as shown in fig. 5, the delay module 100 includes an RC delay circuit 102, an input end of the RC delay circuit 102 is connected to the main control unit, and an output end of the RC delay circuit 102 is connected to the switch module 200, where the RC delay circuit 102 is configured to delay the reset pull-up signal by a preset delay time.
In this embodiment, the RC delay circuit 102 includes a fourth resistor R4 and a first capacitor C1, one end of the fourth capacitor R4 is connected to the main control unit, the other end is connected to the first capacitor C1 and the switch module 200, and the other end of the first capacitor C1 is grounded.
In this embodiment, the main control unit outputs a reset pull-up signal (refer to SYS _ RST in fig. 5), after the reset pull-up signal flows through the fourth resistor R4, the reset pull-up signal charges the first capacitor C1, the voltage of the electrical connection point between the first capacitor C1 and the switch module 200 is at a low level during the charging process of the first capacitor C1, the switch module 200 is turned off, the charging time of the first capacitor C1 corresponds to a preset delay time, when the charging of the first capacitor C1 is completed, the corresponding delay time is over, the voltage of the electrical connection point between the first capacitor C1 and the switch module 200 is at a high level, and the switch module 200 receives the high-level reset pull-up signal to turn on the lighting module 400.
So set up, accomplish the time delay to the reset signal of pulling high through RC delay circuit's charging process.
Fig. 6 is a schematic structural diagram of connection of the delay module, the switch module and the lighting module of the POC indicator control system according to the embodiment of the present application, as shown in fig. 6, the switch module 200 includes a switch circuit unit 201, the switch circuit unit 201 includes a fourth port, a fifth port and a sixth port, the fourth port is connected to the output end of the delay module 100, and the fifth port is connected to the lighting module 400 and the holding module 300; the sixth port is accessed to a first preset level; wherein,
the switch circuit unit 202 is at least used for disconnecting the fifth port from the sixth port when the fourth port receives a reset pull-up signal.
In this embodiment, the switch circuit unit 202 connects the fifth port and the sixth port when the fourth port receives the reset pull-up signal.
The lighting module 400 is configured to turn off the POC indicator when the fifth port and the sixth port are disconnected, and switch on and start the POC indicator when the fifth port and the sixth port are disconnected.
In this embodiment, the first preset level is determined by whether the system sets a high-level lighting condition or a low-level lighting condition, and in this embodiment, the first preset level is a low level; in this embodiment, when the fourth port receives a reset pull-up signal of a high level, the switch circuit unit connects the fifth port and the sixth port, accesses the first preset level corresponding to the fifth port and inputs the first preset level to the lighting module 400, and the lighting module 400 is turned on when accessing the first preset level, and then performs lighting control according to the level of the POC control signal.
Fig. 7 is a topological circuit diagram of a switch module of a control system of a POC indicator light according to an embodiment of the present application, and as shown in fig. 7, the switch circuit unit 201 includes a second switch Q2, the second switch Q2 includes a second control terminal, a second input terminal and a second output terminal, the second control terminal is connected to the second output terminal (corresponding to the output terminal of the delay module 100), the second input terminal is connected to the fifth port (corresponding to the connection of the lighting module 400 and the holding module 300), and the second output terminal is grounded, where the second switch Q2 is configured to control the second input terminal and the second output terminal to be disconnected when a reset pull-up signal is not received; the lighting module 400 is configured to turn off the POC indicator when the second input terminal and the second output terminal are disconnected.
In this embodiment, when the fourth port receives the reset pull-up signal with high level, the second switch Q2 connects the second input end and the second output end, and the second input end is connected to the first preset level and input to the lighting module 400, and the lighting module 400 is turned on when connected to the first preset level, and then performs lighting control according to the level of the POC control signal.
It should be noted that the second switching tube Q2 in the embodiment of the present application includes, but is not limited to, a triode or a MOS tube, and is preferably a MOS tube. Moreover, according to the disclosure of the present application, a person skilled in the art can easily think that the corresponding switching circuit unit disclosed in the present application is modified into a switching circuit unit adapted to the selection type of the switching tube according to the specific selection type of the switching tube, and therefore, the present application can be implemented whether the switching tube is an NPN-type or PNP-type triode or an N-channel or P-channel switching MOS tube, and is not limited in the embodiments of the present application.
Fig. 8 is a topology circuit diagram of a POC indicator control system according to an embodiment of the present application, and as shown in fig. 8, the lighting module 400 includes a first switch unit 401, an input terminal of the first switch unit 401 is connected to the POC indicator L1, a control terminal of the first switch unit 401 is electrically connected to a control terminal of the lighting module 400 (corresponding to the connection with the holding module 300 and the main control unit), an output terminal of the first switch unit 401 is grounded, wherein,
the first switching unit 401 is configured to output a first voltage according to a level of a control terminal of the first switching unit 401.
In this embodiment, the level of the control terminal of the first switch unit 401 includes the level of the received POC control signal, and/or the holding module 300 processes the maintained preset level, and during the POC identification phase of the master control unit, the level of the control terminal of the first switch unit 401 is the level of the POC control signal, and during the first preset duration (the initialized POC configuration phase), the level of the control terminal of the first switch unit 401 is the preset level processed and maintained by the holding module 300.
In this embodiment, in the POC identification phase of the main control unit, when the level of the POC control signal is low, due to the holding function of the holding module 30, the first switch unit 401 is activated, the input terminal of the first switch unit 401 is connected to the output terminal, and the first switch unit 401 pulls down the anode corresponding to the POC indicator light L1 to ground; when the level of the POC control signal is high, the first switch unit 401 is turned off, the input terminal and the output terminal of the first switch unit 401 are disconnected, and the anode corresponding to the POC indicator light L1 is kept pulled up.
The POC indicator light L1 is used to switch in the first voltage and emits light when the first voltage is within a first set voltage value (high level).
In the present embodiment, the first voltage is converted into a control signal for powering up and down the POC indicator lamp L1 through the holding module 300 and the first switch unit 401, thereby implementing the lighting operation of the lighting module 400.
In some embodiments, the first switch unit 401 includes a third switch Q3, the third switch Q3 includes a third control terminal, a third input terminal and a third output terminal, the third control terminal is connected to the control terminal (corresponding to the connection with the main control unit) of the lighting module 400, the third input terminal is connected to the POC indicator light L1, the third input terminal is further connected to the first power VCC through a series fifth resistor R5, and the third output terminal is grounded, wherein the third switch Q3 is configured to connect or disconnect the third input terminal and the third output terminal according to a level of the third control terminal, and control the third input terminal to generate the first voltage.
In this embodiment, the level of the third control terminal includes the level of the POC control signal, and/or the holding module 300 processes the maintained preset level; in this embodiment, the third control terminal is connected to the main control unit through a series connection sixth resistor R6.
In this embodiment, the level of the third terminal of the third switch Q3 includes the level of the received POC control signal, and/or the holding module 300 processes the maintained preset level, during the POC identification phase of the master unit, the level of the third terminal of the third switch Q3 is the level of the POC control signal, and during the first preset duration (the initialized POC configuration phase), the level of the third terminal of the third switch Q3 is the preset level processed and maintained by the holding module 300.
In this embodiment, in the POC identification phase of the main control unit, when the level of the POC control signal is low, due to the holding function of the holding module 30, the third switch Q3 is turned on, the third input terminal of the third switch Q3 is connected to the third output terminal, and the third switch Q3 pulls the anode corresponding to the POC indicator light L1 to ground; when the level of the POC control signal is high, the third transistor Q3 is turned off, the third input terminal of the third transistor Q3 is disconnected from the third output terminal, and the anode corresponding to the POC indicator light L1 is kept pulled up.
It should be noted that the third switching transistor Q3 in the embodiment of the present application includes, but is not limited to, a triode or a MOS transistor, and is preferably a MOS transistor. Moreover, according to the disclosure of the present application, a person skilled in the art can easily think that the corresponding switching unit disclosed in the present application is modified into a switching unit adapted to the selection of the switching tube according to the specific selection of the switching tube, and therefore, the present application can be implemented whether the switching tube is an NPN-type or PNP-type triode, or an N-channel or P-channel switching MOS tube, and is not limited in the embodiments of the present application.
The operation of the POC indicating lamp control system according to the embodiment of the present application is described below with reference to the specific embodiment of the present application shown in fig. 8 as follows:
the timing and lighting conditions of POC indication control according to the embodiment of the present application are as follows:
in this embodiment, the system design requirement is POC pull-down and high level lighting is realized, and the indicator lights are turned off after the system is started.
In the delay phase, although the reset pull-up signal output by the main control unit is transmitted to the first capacitor C1, the reset pull-up signal charges the first capacitor C1, the second switch tube Q2 of the switch module 200 receives an equivalent reset pull-down signal, the second switch tube Q2 and the switch module 200 are in an off state, the lighting module 400 is turned off, and the POC indicator light L1 is in an off state; i.e. POC identification phase, POC light L1 is all in the off state.
After the delay is over, the reset pull-up signal is transmitted to the second switch Q2, the second switch Q2 is turned on, the lighting module 400 is started, and the lighting module 400 completes lighting control according to the POC control signal.
Meanwhile, in the POC identification stage of the main control unit, although the POC indicating lamp L1 is in an off state, and the POC control signal is at a low level, the voltage dividing circuit formed by the third resistor R3 and the sixth resistor R6 makes the voltage received by the third control terminal of the third switch transistor Q3 be:
the third switching tube Q3 is turned on, the third input end and the third output end of the third switching tube Q3 are communicated, and the third switching tube Q3 pulls down the anode corresponding to the POC indicator light L1 to the ground, so as to ensure that the POC indicator light L1 does not light up; in the POC identification stage, the second switch Q2 is in an off state, and the cathode of the POC indicator light L1 is suspended, thereby further ensuring that the POC indicator light L1 does not emit light.
In the POC identification stage, the second switch Q2 is in an off state, the cathode of the POC indicating lamp L1 is connected to the first control terminal of the first switch Q1, the level of the first control terminal is equivalent to the voltage of the anode of the POC indicating lamp L1 (ignoring the voltage drop of the POC indicating lamp L1), at this time, if the POC control signal is high, the first input terminal of the first switch Q1 is pulled up to the first power or the POC control signal pulled up to high level, the first input terminal of the first switch Q1 is high level, the first switch Q1 is turned on, after the first switch Q1 is turned on, the first input terminal of the first switch Q1 and the third control terminal of the third switch Q3 are pulled down to ground, the third switch Q3 is turned off, the third input terminal of the third switch Q3 is turned off from the third output terminal, the anode corresponding to the POC indicating lamp L1 is kept pulled up, and the equivalent of the POC indicating lamp module 400 receives correct lighting level of the POC control signal, meanwhile, since the second switch Q2 is turned off, the POC light L1 cannot form a conducting loop, and the POC light L1 does not light.
When the POC control signal is at a high level, the third control terminal of the third switch Q3 is connected to the second resistor R2 and the third switch Q1 after the first switch Q1 is turned on in consideration of the voltage dividing effect of the second resistor R2The voltage divided by the voltage dividing circuit consisting of the three resistors R3 is as follows:
the third switch tube Q3 can be driven to conduct, the third input end and the third output end of the third switch tube Q3 are communicated, the anode corresponding to the POC indicator light L1 is pulled down to the ground by the third switch tube Q3, and at this time, the POC indicator light L1 does not light up.
In the POC identification stage, by turning off the second switch Q2, when there are a plurality of POC lighting controls, since the plurality of POC indicating lamps are all controlled by the second switch Q2 or the switch module 200, in the system reset and POC identification stage, even if different POC control logics are adopted, the lighting module 400 is blocked by the second switch Q2 or the switch module 200, that is, no conductive path is formed, and the plurality of POC indicating lamps are turned off in the system reset and POC identification stages.
During a first preset duration after POC identification is completed, the system performs initial system configuration, at this time, a reset pull-up signal is transmitted to a fourth port of the second switch tube Q2, when the fourth port receives a reset pull-up signal of a high level, the second input end and the second output end are connected, the second input end is connected to the first preset level and input to the lighting module 400, the lighting module 400 is turned on when being connected to the first preset level, the first control end of the first switch tube Q1 is connected to a low level, the first input end and the first output end of the first switch tube Q1 are disconnected, so that the first input end is suspended, and at this time, the POC control signal is turned on/off according to the high level/Pulse level of the POC signal configured for system initialization.
Within a first preset time after the POC identification is completed, the state of the POC indicator lamp is: and (3) flashing, but because the flashing frequency is very high, the flashing frequency cannot be distinguished by naked eyes generally, and the final visual effect does not influence the final lighting logic.
In a second aspect, an embodiment of the present application provides a control method for a control system using the above POC indicator light, where the control method includes: the delay module delays the reset pull-up signal for a preset delay time and then transmits the reset pull-up signal to the switch module; the switch module generates a turn-off signal and transmits the turn-off signal to the lighting module when receiving the reset pull-up signal; the keeping module keeps the control end of the lighting module to receive the preset level in a first preset time after the main control unit finishes the POC identification, and keeps the control end of the lighting module to receive the POC control signal with correct level in the POC identification stage of the main control unit; and the lighting module extinguishes the POC indicator lamp when receiving the turn-off signal, and/or drives the POC indicator lamp to be on or off according to the level of the control end of the lighting module.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A control system of POC indicator light is characterized by comprising a time delay module, a switch module, a holding module and a lighting module, wherein the switch module is respectively and electrically connected with the time delay module, the holding module and the lighting module, the holding module is also electrically connected with the lighting module, the lighting module and the time delay module are also respectively and electrically connected with a main control unit of equipment, wherein,
the main control unit is used for outputting a reset pull-up signal and a POC control signal;
the delay module is at least used for delaying the reset pull-up signal by a preset delay time and transmitting the delayed reset pull-up signal to the switch module, wherein the preset delay time is not less than the time required by the main control unit for POC (point of sale) identification;
the switch module is at least used for generating a turn-off signal and transmitting the turn-off signal to the lighting module when receiving the reset pull-up signal;
the holding module is configured to maintain the control end of the lighting module to receive a preset level within a first preset duration after the POC identification is completed by the main control unit, and to keep the control end of the lighting module to receive the POC control signal with a correct level in a POC identification stage performed by the main control unit, where the control end of the lighting module is a POC signal configuration end of the lighting module;
the lighting module is used for turning off the POC indicator lamp when receiving the turn-off signal, and/or driving the POC indicator lamp to be on or off according to the level of the control end of the lighting module.
2. The POC indicator light control system of claim 1, wherein the retention module comprises a first retention unit comprising a first port electrically connected to an electrical connection point of the switch module and the lighting module, a second port connected to a control terminal of the lighting module, and a third port connected to ground, wherein,
the first keeping unit is configured to connect the second port with the third port within the first preset duration, and maintain the second port disconnected from the third port during a POC identification phase performed by the main control unit;
the control end of the lighting module is connected to the preset level when the second port is communicated with the third port, and receives the POC control signal with correct level when the second port is disconnected from the third port.
3. The POC indicator control system of claim 2, wherein the first holding unit comprises a first switch tube, a first resistor, a second resistor, and a third resistor, the first switch tube comprises a first control terminal, a first input terminal, and a first output terminal, the first control terminal is connected to the first port in series with the first resistor, the first input terminal is connected to the second resistor, the first output terminal is grounded, the other end of the second resistor is connected to the second port and the third resistor, and the other end of the third resistor is connected to a first power supply; wherein,
the first switch tube is used for connecting or disconnecting the first input end and the first output end according to a first level received by the first control end;
and when the first input end is connected with the first output end, the control end of the lighting module is connected with the preset level, and receives the POC control signal with correct level under the condition that the first input end is disconnected with the first output end.
4. The POC indicator light control system of claim 1, wherein the delay module comprises a delay unit, an input terminal of the delay unit is connected to the main control unit, and an output terminal of the delay unit is connected to the switch module, wherein the delay unit is at least configured to delay the reset pull-up signal by the preset delay time.
5. The POC indicator light control system of claim 4, wherein the time delay comprises a time relay.
6. The POC indicator light control system of claim 1, wherein the delay module comprises an RC delay circuit, an input terminal of the RC delay circuit is connected to the main control unit, and an output terminal of the RC delay circuit is connected to the switch module, wherein the RC delay circuit is configured to delay the reset pull-up signal by the preset delay time.
7. The POC indicator light control system of claim 1, wherein the switch module comprises a switch circuit unit, the switch circuit unit comprises a fourth port, a fifth port and a sixth port, the fourth port is connected with the output end of the delay module, the fifth port is electrically connected with the lighting module and the holding module, the sixth port is switched in a first preset level, wherein,
the switch circuit unit is at least used for disconnecting the fifth port from the sixth port when the fourth port receives the reset pull-up signal;
the lighting module is used for turning off the POC indicator lamp when the fifth port and the sixth port are disconnected.
8. The POC indicator light control system of claim 7, wherein the switching circuit unit comprises a second switching tube, the second switching tube comprising a second control terminal, a second input terminal and a second output terminal, the second control terminal being electrically connected to the fourth port, the second input terminal being electrically connected to the fifth port, the second output terminal being grounded, wherein,
the second switch tube is at least used for controlling the second input end and the second output end to be disconnected when receiving the reset pull-up signal;
the lighting module is used for turning off the POC indicator lamp when the second input end and the second output end are disconnected.
9. The control system for POC indicator lights according to claim 1, wherein the lighting module comprises a first switch unit, an input terminal of the first switch unit is connected to the POC indicator lights, a control terminal of the first switch unit is electrically connected to the control terminal of the lighting module, and an output terminal of the first switch unit is grounded, wherein,
the first switch unit is used for outputting a first voltage according to the level of the control end of the first switch unit;
the POC indicator lamp is used for being switched in the first voltage and emitting light when the first voltage is within a first set voltage value range.
10. The POC indicator light control system according to claim 9, wherein the first switch unit comprises a third switch tube, the third switch tube comprises a third control terminal, a third input terminal and a third output terminal, the third control terminal is connected to the control terminal of the lighting module, the third input terminal is connected to the POC indicator light, the third input terminal is further connected to a first power source through a series fifth resistor, and the third output terminal is connected to ground, wherein the third switch tube is configured to connect or disconnect the third input terminal and the third output terminal according to a level of the third control terminal, and control the third input terminal to generate the first voltage.
11. A control method of a control system applying the POC indicator light of any one of claims 1 to 10, wherein the control method comprises:
the delay module delays the reset pull-up signal by a preset delay time and then transmits the reset pull-up signal to the switch module;
the switch module generates a turn-off signal and transmits the turn-off signal to the lighting module when receiving the reset pull-up signal;
the holding module maintains the control end of the lighting module to receive a preset level within a first preset time after the main control unit finishes POC identification, and keeps the control end of the lighting module to receive the POC control signal with correct level in a POC identification stage of the main control unit;
and the lighting module extinguishes the POC indicator lamp when receiving the turn-off signal, and/or drives the POC indicator lamp to be on or off according to the level of the control end of the lighting module.
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