CN112003479A - Digital quantity acquisition circuit and acquisition method - Google Patents
Digital quantity acquisition circuit and acquisition method Download PDFInfo
- Publication number
- CN112003479A CN112003479A CN202010902689.2A CN202010902689A CN112003479A CN 112003479 A CN112003479 A CN 112003479A CN 202010902689 A CN202010902689 A CN 202010902689A CN 112003479 A CN112003479 A CN 112003479A
- Authority
- CN
- China
- Prior art keywords
- signal
- circuit
- level signal
- input
- digital quantity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33515—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with digital control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
- H02M1/092—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the control signals being transmitted optically
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0012—Control circuits using digital or numerical techniques
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a digital quantity acquisition circuit and an acquisition method. The circuit includes: a direct current signal input terminal; a transformer, the primary side of which is connected with the direct current signal input end; the input end of the signal rectification filter circuit is connected with the secondary side of the transformer, and the output end of the signal rectification filter circuit outputs a direct-current voltage signal DI _ S; the input end of the signal detection circuit is connected with the direct current signal input end, and the output end of the signal detection circuit outputs a level signal DI _ C; and the input end of the signal judgment circuit is respectively connected with the output end of the signal rectification filter circuit and the output end of the signal detection circuit and is used for converting the direct-current voltage signal DI _ S into a first logic level signal DI _ S', comparing the direct-current voltage signal DI _ S and the level signal DI _ C input by the input end and controlling the acquisition value of the output digital quantity according to the comparison result. The method is realized based on the acquisition circuit, is simple and effective, and greatly improves the reliability of digital quantity acquisition.
Description
Technical Field
The invention belongs to the technical field of power electronics, and particularly relates to a digital quantity acquisition circuit and an acquisition method.
Background
At present, a digital quantity acquisition circuit is widely applied to various industrial control fields and control systems of rail transit, and the accuracy and reliability of digital quantity signal sampling play an important role in whether a whole measurement and control system and a train control system can work normally, stably and reliably. At present, the development of digital signal acquisition circuits focuses on improving acquisition accuracy, enhancing anti-interference capability, reducing power consumption, preventing corrosion, impact, vibration and the like, and lacks detection on the safety of the acquisition circuits. If the acquisition circuit or the acquisition board card has a hardware fault, the signal acquisition is abnormal, and if the CPU cannot effectively judge that the signal is abnormal, the whole measurement and control system or the train control system is greatly influenced. The existing design for self-checking the self-circuit lacks real-time performance, the existence of faults cannot be found in the first time, the authenticity of detection signals and the reliability of a control system can be greatly reduced, and particularly the running safety of a train can be influenced.
Disclosure of Invention
The invention provides a digital quantity acquisition circuit and an acquisition method aiming at the technical problems, the acquisition method is simple and effective, the accuracy and the reliability of digital quantity acquisition are greatly improved, vehicle control faults caused by abnormal signal acquisition are avoided, the circuit and the method have important significance for improving the reliability and the safety of vehicle operation, and high-reliability application occasions are met.
In order to achieve the above object, the present invention provides a digital quantity acquisition circuit, which includes a dc signal input terminal, and further includes:
the primary side of the transformer is connected with the direct-current signal input end and is used for isolating input signals and converting amplitude values;
the input end of the signal rectification filter circuit is connected with the secondary side of the transformer and used for rectifying the output signal of the transformer into a direct-current voltage signal DI _ S with stable amplitude and outputting the direct-current voltage signal DI _ S;
the input end of the signal detection circuit is connected with the direct current signal input end, and the signal detection circuit is used for detecting and isolating the input signal and outputting a level signal DI _ C;
and the input end of the signal judgment circuit is respectively connected with the output end of the signal rectification filter circuit and the output end of the signal detection circuit and is used for converting the direct-current voltage signal DI _ S into a first logic level signal DI _ S', comparing the direct-current voltage signal DI _ S and the level signal DI _ C input by the input end and controlling the acquisition value of the output digital quantity according to the comparison result.
Preferably, the protection circuit further comprises a drive protection circuit, wherein the drive protection circuit comprises a passive crystal oscillator Y1, a counter U1, a resistor R3, a diode D5, a triode Q1, a diode D3, a zener diode D4 and a resistor R4; the passive crystal oscillator Y1 is connected with the counter U1, is connected with the resistor R3 in series and then is connected with the base electrode of the triode Q1, the collector electrode of the triode Q1 is connected with the primary side of the transformer, and the emitter electrode of the triode Q1 is connected with the direct-current signal input end; the diode D3, the diode D5, the voltage stabilizing diode D4 and the resistor R4 form a protection circuit, and the protection circuit is used for free flow and voltage stabilizing protection of input signals on the primary side of the transformer.
Preferably, the filter protection circuit further comprises a voltage dependent resistor RV1, a TVS tube D1, a resistor R1 and a capacitor C1; the filter circuit is formed by connecting a resistor R1 and a capacitor C1 in series, the voltage dependent resistor RV1 is connected with the TVS tube D1 and the filter circuit in parallel and then connected with a direct current signal input end, the output end of the filter protection circuit is connected with the primary side of a transformer, and the capacitor C1 is a four-pin capacitor.
Preferably, the transformer further comprises a voltage stabilizing diode D2, wherein the cathode of the voltage stabilizing diode D2 is connected with one end of the resistor R1, and the anode thereof is connected with one end of the primary side of the transformer; the zener diode D2 and the resistor R1 form a signal voltage divider circuit.
Preferably, the signal rectifying and filtering circuit comprises a four-port bridge rectifying circuit, a capacitor C2, a capacitor C3 and a capacitor C4, wherein a first input end of the bridge rectifying circuit is connected with one end of the secondary side of the transformer through the capacitor C2; the second input end is connected with the other end of the secondary side of the transformer through a capacitor C3; two output ends of the capacitor are connected in parallel with a capacitor C4 grounded GND, and then a direct current voltage signal DI _ S is output.
Preferably, the signal detection circuit comprises a resistor R2, a photoelectric coupler U2, a resistor R5; the input end of the photoelectric coupler U2 is connected with the direct current signal input end through a resistor R2, the first output end of the photoelectric coupler U2 is connected with a power supply VCC, the second output end of the photoelectric coupler U2 is grounded GND, and the third output end of the photoelectric coupler U is connected with a resistor R5 connected with the power supply VCC in parallel and then outputs a level signal DI _ C.
Preferably, the signal detection circuit outputs the level signal DI _ C in the following manner:
if the direct current signal input end has an input signal, the level signal DI _ C output by the photoelectric coupler U2 is at a high level;
if there is no input signal at the dc signal input terminal, the level signal DI _ C output by the photocoupler U2 is at low level.
Preferably, the signal decision circuit comprises an exclusive-nor logic circuit U3, a conversion driver U4, a switch S1 and a resistor R6 with one end grounded to GND;
the output end of the signal rectifying and filtering circuit is connected to the input end of a conversion driver U4, the output end of a conversion driver U4 is connected to one end of a switch S1, and the other end of the switch S1 is connected with a resistor R6 in parallel and then outputs a digital value acquisition value; the conversion driver U4 is used for converting the dc voltage signal DI _ S into a first logic level signal DI _ S';
the output end of the signal detection circuit and the output end of the signal rectifying and filtering circuit are connected to the input end of the exclusive-nor logic circuit U3, and the output end of the exclusive-nor logic circuit U3 outputs a second logic level signal CTL _ S for controlling the switch S1.
Preferably, the signal decision circuit further includes:
a first filter circuit, an input terminal of which is connected to the output terminal of the conversion driver U4, and an output terminal of which is connected to one terminal of the switch S1, and outputs a third logic level signal DI _ P;
and the input end of the second filter circuit is connected with the output end of the exclusive-nor logic circuit U3, and the second filter circuit outputs a fourth logic level signal CTL _ P for controlling the switch S1.
The invention also provides a digital quantity acquisition method, which is based on the digital quantity acquisition circuit and comprises the following steps:
after the input signal is isolated by a transformer and subjected to amplitude conversion, the input signal is rectified and filtered by a signal rectification filter circuit, and a direct current voltage signal DI _ S with stable amplitude is output and transmitted to a signal judgment circuit;
the signal detection circuit detects and isolates an input signal, outputs a level signal DI _ C and transmits the level signal DI _ C to the signal judgment circuit;
the direct current voltage signal DI _ S is converted into a first logic level signal DI _ S' through the signal decision circuit;
the direct current voltage signal DI _ S and the level signal DI _ C are compared through a signal judgment circuit, and the acquisition value of the output digital quantity is controlled according to the comparison result.
Preferably, the method of controlling the acquisition value of the output digital quantity according to the comparison result is:
if the direct current voltage signal DI _ S is consistent with the level signal DI _ C, outputting a first logic level signal DI _ S' as a digital quantity acquisition value;
if the dc voltage signal DI _ S is inconsistent with the level signal DI _ C, a logic "0" is output as the digital value.
Preferably, the input signal is further filter-protected by the filter protection circuit and then input to the primary side of the transformer by the driving protection circuit; the drive protection circuit generates a square wave signal to control an input signal at the primary side of the transformer and carry out follow current and amplitude limiting protection on the input signal.
Preferably, the signal decision circuit comprises an exclusive or gate logic circuit U3, a conversion driver U4, a switch S1, a resistor R6 with one end grounded to GND, a first filter circuit and a second filter circuit;
the direct current voltage signal DI _ S is converted into a first logic level signal DI _ S' through a conversion driver U4;
the direct current voltage signal DI _ S and the level signal DI _ C are subjected to an exclusive OR operation through an exclusive OR gate logic circuit U3 to generate a second logic level signal CTL _ S;
the first logic level signal DI _ S' is filtered by a first filter circuit to generate a third logic level signal DI _ P;
the second logic level signal CTL _ S is filtered by a second filter circuit to generate a fourth logic level signal CTL _ P;
if the fourth logic level signal CTL _ P is logic "1", the direct current voltage signal DI _ S is consistent with the level signal DI _ C, and at this time, the control switch S1 is closed, and the third logic level signal DI _ P generated by filtering is used as digital quantity acquisition output of the acquisition circuit;
if the fourth logic level signal CTL _ P is logic "0", the dc voltage signal DI _ S is inconsistent with the level signal DI _ C, which indicates that the acquisition circuit is faulty, and at this time, the control switch S1 is turned off, and the logic "0" is used as the digital quantity acquisition output of the acquisition circuit.
Compared with the prior art, the invention has the advantages and positive effects that:
1. the invention adopts the photoelectric coupler as a signal detection circuit to detect and compare input signals, and controls the output of a digital quantity acquisition value according to the comparison result of the comparison between the output signal of the detection circuit and the input signal after rectification and conversion, thereby further improving the effectiveness and reliability of digital quantity acquisition;
2. the passive device transformer is used as a digital quantity isolation acquisition device, the failure rate of the transformer is low, and the reliability of the circuit is improved;
3. the filter capacitor C1 in the filter protection circuit adopts a four-pin capacitor design, so that the circuit can sense faults under the condition that the capacitor pins are disconnected, and the working reliability of the circuit is improved.
Drawings
FIG. 1 is a schematic structural diagram of a digital value acquisition circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a circuit connecting a filter capacitor C1 with a conventional capacitor according to an embodiment of the present invention;
FIG. 3 is a flow chart of a digital quantity acquisition method according to an embodiment of the present invention;
wherein: 1. a direct current signal input terminal; 2. a transformer; 3. a signal rectification filter circuit; 4. a signal detection circuit; 5. a signal decision circuit; 6. a drive protection circuit; 7. and a filter protection circuit.
Detailed Description
Hereinafter, embodiments of the present invention will be further described with reference to the accompanying drawings.
In the description of the present invention, it should be noted that the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The invention firstly provides a digital quantity acquisition circuit which can be used for acquiring and outputting digital quantity.
A digital quantity acquisition circuit, the structure of which refers to figure 1, comprises a direct current signal input end 1, a transformer 2, a signal rectification filter circuit 3, a signal detection circuit 4 and a signal decision circuit 5;
a transformer 2, the primary side of which is connected with the direct current signal input end 1, and is used for the isolation and amplitude conversion of input signals;
the input end of the signal rectifying and filtering circuit 3 is connected with the secondary side of the transformer 2 and is used for rectifying the output signal of the transformer 2 into a direct-current voltage signal DI _ S with stable amplitude and outputting the direct-current voltage signal DI _ S;
a signal detection circuit 4, the input end of which is connected with the direct current signal input end 1, and is used for detecting and isolating the input signal and outputting a level signal DI _ C;
and the input end of the signal judgment circuit 5 is respectively connected with the output end of the signal rectification filter circuit 3 and the output end of the signal detection circuit 4, and is used for converting the direct-current voltage signal DI _ S into a first logic level signal DI _ S', comparing the direct-current voltage signal DI _ S and the level signal DI _ C input by the input end, and controlling the acquisition value of the output digital quantity according to the comparison result. For example, as shown in fig. 1, in this embodiment, a transformer is used as an isolated acquisition device for an input signal, so as to further improve the reliability of the acquisition circuit.
Specifically, with reference to fig. 1, the signal rectifying and filtering circuit 3 includes a four-port bridge rectifying circuit, a capacitor C2, a capacitor C3, and a capacitor C4, and a first input end of the bridge rectifying circuit is connected to one end of the secondary side of the transformer 2 through a capacitor C2; the second input end is connected with the other end of the secondary side of the transformer 2 through a capacitor C3; two output ends of the capacitor are connected in parallel with a capacitor C4 grounded GND, and then a direct current voltage signal DI _ S is output. In this embodiment, the signal rectifying and filtering circuit 3 rectifies and filters the signal output from the secondary side of the transformer 2 to obtain a dc voltage signal DI _ S with a stable amplitude, and outputs the dc voltage signal DI _ S to the signal decision circuit 5.
With continued reference to fig. 1, the signal detection circuit 4 includes a resistor R2, a photocoupler U2, a resistor R5; the input end of the photoelectric coupler U2 is connected with the direct current signal input end 1 through a resistor R2, the first output end of the photoelectric coupler U2 is connected with a power supply VCC, the second output end of the photoelectric coupler U2 is grounded GND, and the third output end of the photoelectric coupler U2 is connected with a resistor R5 connected with the power supply VCC in parallel and then outputs a level signal DI _ C to the signal decision circuit 5. The power supply VCC provides a power supply voltage for the photoelectric coupler U2, and specifically, if an input signal is provided at the dc signal input terminal 1, the level signal DI _ C output by the photoelectric coupler U2 is a high level; if there is no input signal at the dc signal input terminal 1, the level signal DI _ C output by the photocoupler U2 is at low level. In this embodiment, the signal detection circuit 4 is formed by a photoelectric coupler, the input signal of the dc signal input terminal 1 is detected and isolated, and the reliability of the digital value acquisition circuit is further improved by comparing the input signal with the signal decision circuit 5.
With continued reference to fig. 1, the signal decision circuit 5 includes an exclusive or gate logic circuit U3, a switch driver U4, a switch S1, and a resistor R6 with one end grounded to GND;
the output end of the signal rectifying and filtering circuit 3 is connected to the input end of a conversion driver U4, the output end of a conversion driver U4 is connected to one end of a switch S1, and the other end of the switch S1 is connected with a resistor R6 in parallel and then outputs a digital value acquisition value; the conversion driver U4 is used for converting the dc voltage signal DI _ S into a first logic level signal DI _ S';
the output end of the signal detection circuit 4 and the output end of the signal rectifying and filtering circuit 3 are commonly connected to the input end of the exclusive-nor logic circuit U3, and the output end of the exclusive-nor logic circuit U3 outputs a second logic level signal CTL _ S for controlling the switch S1. Specifically, in this embodiment, the exclusive or logic circuit U3 is used to determine whether the dc voltage signal DI _ S output by the signal rectifying and filtering circuit 3 is consistent with the level signal DI _ C output by the signal detecting circuit 4, and it is reliable:
if the second logic level signal CTL _ S is logic "1", it indicates that DI _ S is consistent with DI _ C and is authentic, the control switch S1 is closed, and the first logic level signal DI _ S' is output as the digital value acquisition value of the acquisition circuit;
if the second logic level signal CTL _ S is logic "0", it indicates that DI _ S is not consistent with DI _ C, and the acquisition circuit fails, the control switch S1 is turned off, and logic "0" is output as the digital quantity of the acquisition circuit.
Preferably, with continued reference to fig. 1, the signal decision circuit 5 further comprises:
a first filter circuit, an input terminal of which is connected to the output terminal of the conversion driver U4, and an output terminal of which is connected to one terminal of the switch S1, and outputs a third logic level signal DI _ P;
and the input end of the second filter circuit is connected with the output end of the exclusive-nor logic circuit U3, and the second filter circuit outputs a fourth logic level signal CTL _ P for controlling the switch S1.
Specifically, in this embodiment, the first filter circuit and the second filter circuit further filter DI _ S' and CTL _ S to generate a third logic level signal DI _ P and a fourth logic level signal CTL _ P, where the fourth logic level signal CTL _ P is used to control the switch S1, so as to control the actual digital value acquisition output value of the acquisition circuit, and improve the reliability of the circuit.
With continued reference to fig. 1, in a preferred embodiment, the acquisition circuit further includes a driving protection circuit 6, and the driving protection circuit 6 includes a passive crystal oscillator Y1, a counter U1, a resistor R3, a diode D5, a transistor Q1, a diode D3, a zener diode D4, and a resistor R4; the passive crystal oscillator Y1 is connected with the counter U1, is connected with the resistor R3 in series and then is connected with the base electrode of the triode Q1, the collector electrode of the triode Q1 is connected with the primary side of the transformer 2, and the emitter electrode of the triode Q1 is connected with the direct-current signal input end 1; the diode D3, the diode D5, the voltage stabilizing diode D4 and the resistor R4 form a protection circuit, and the protection circuit is used for the follow current and voltage stabilizing protection of the input signal at the primary side of the transformer 2. In this embodiment, the passive crystal oscillator Y1 provides a driving clock signal of the counter U1, controls the U1 to generate a square wave signal, and is used to drive the transistor Q1, control the on and off of the Q1, and control the input signal of the primary side of the transformer 2 to perform freewheeling and amplitude limiting protection.
With continued reference to fig. 1, the digital quantity acquisition circuit further includes a filter protection circuit 7, wherein the filter protection circuit 7 includes a voltage dependent resistor RV1, a TVS tube D1, a resistor R1 and a capacitor C1; the filter circuit is formed by connecting a resistor R1 and a capacitor C1 in series, the voltage dependent resistor RV1, the TVS tube D1 and the filter circuit are connected in parallel and then connected with the direct current signal input end 1, the output end of the filter protection circuit 7 is connected with the primary side of the transformer 2, and the capacitor C1 is a four-pin capacitor. In the preferred embodiment, a four-pin capacitor is adopted as the filter capacitor C1, and referring to fig. 2, compared with a conventional capacitor, the circuit can sense a fault when the capacitor pin is disconnected, and the reliability of the circuit operation is improved.
Further, with continued reference to fig. 1, the digital quantity acquisition circuit further includes a zener diode D2, a cathode of the zener diode D2 is connected to one end of the resistor R1, and an anode thereof is connected to one end of the primary side of the transformer; the zener diode D2 and the resistor R1 form a signal divider circuit for further reducing the voltage of the input signal. In the signal voltage division circuit, an input signal loop current passes through a resistor R1, a voltage difference is formed on a resistor R1, meanwhile, a voltage stabilizing diode D2 works in a reverse breakdown state, and a voltage difference is formed between a negative electrode and a positive electrode, so that the voltage reaching the primary side of a transformer is further reduced, and the working condition of the circuit can be met.
The acquisition circuit performs a direct current-square wave-direct current signal conversion mode on an input signal, and performs detection and comparison of the signal in a mode of assisting a signal detection circuit comprising a photoelectric coupler, so that the effectiveness and reliability of digital quantity signal acquisition are ensured; meanwhile, a transformer is used as an isolated acquisition device of an input signal, and a four-pin capacitor is used as a filter capacitor of a direct-current signal input end, so that the reliability of the circuit is further improved.
The invention also provides a digital quantity acquisition method, which is based on the acquisition circuit and comprises the following steps:
after the input signal is isolated by a transformer and subjected to amplitude conversion, the input signal is rectified and filtered by a signal rectification filter circuit, and a direct current voltage signal DI _ S with stable amplitude is output and transmitted to a signal judgment circuit;
the signal detection circuit detects and isolates an input signal, outputs a level signal DI _ C and transmits the level signal DI _ C to the signal judgment circuit;
the direct current voltage signal DI _ S is converted into a first logic level signal DI _ S' through the signal decision circuit;
the direct current voltage signal DI _ S and the level signal DI _ C are compared through a signal judgment circuit, and the acquisition value of the output digital quantity is controlled according to the comparison result. Specifically, the method for controlling the acquisition value of the output digital quantity according to the comparison result comprises the following steps: if the direct current voltage signal DI _ S is consistent with the level signal DI _ C, outputting a first logic level signal DI _ S' as a digital quantity acquisition value; if the dc voltage signal DI _ S is inconsistent with the level signal DI _ C, a logic "0" is output as the digital value.
In a preferred embodiment, before entering the primary side of the transformer, the input signal sequentially passes through a filter protection circuit and a pair of drive protection circuits; the filter protection circuit carries out further filter protection on the input signal, drives the protection circuit to generate a square wave signal, controls the input signal on the primary side of the transformer, and carries out follow current and amplitude limiting protection on the input signal.
Further, the signal decision circuit comprises an exclusive-nor logic circuit U3, a conversion driver U4, a switch S1, a resistor R6 with one end grounded to GND, a first filter circuit and a second filter circuit;
referring to fig. 3, the dc voltage signal DI _ S and the level signal DI _ C are subjected to an exclusive nor operation by an exclusive nor logic circuit U3 to generate a second logic level signal CTL _ S;
the dc voltage signal DI _ S outputs a first logic level signal DI _ S' via the conversion driver U4;
the first logic level signal DI _ S' is filtered by a first filter circuit to generate a third logic level signal DI _ P;
the second logic level signal CTL _ S is filtered by a second filter circuit to generate a fourth logic level signal CTL _ P;
if the fourth logic level signal CTL _ P is logic "1", the dc voltage signal DI _ S is consistent with the level signal DI _ C and is authentic, at this time, the control switch S1 is closed, and the third logic level signal DI _ P generated by filtering is used as the digital quantity acquisition output of the acquisition circuit;
if the fourth logic level signal CTL _ P is logic "0", the dc voltage signal DI _ S is inconsistent with the level signal DI _ C and is not trusted, which indicates that the acquisition circuit is faulty, and at this time, the control switch S1 is turned off, and the logic "0" is used as the digital quantity acquisition output of the acquisition circuit.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (13)
1. Digital quantity acquisition circuit, including direct current signal input end, its characterized in that still includes:
the primary side of the transformer is connected with the direct-current signal input end and is used for isolating input signals and converting amplitude values;
the input end of the signal rectification filter circuit is connected with the secondary side of the transformer and used for rectifying the output signal of the transformer into a direct-current voltage signal DI _ S with stable amplitude and outputting the direct-current voltage signal DI _ S;
the input end of the signal detection circuit is connected with the direct current signal input end, and the signal detection circuit is used for detecting and isolating the input signal and outputting a level signal DI _ C;
and the input end of the signal judgment circuit is respectively connected with the output end of the signal rectification filter circuit and the output end of the signal detection circuit and is used for converting the direct-current voltage signal DI _ S into a first logic level signal DI _ S', comparing the direct-current voltage signal DI _ S and the level signal DI _ C input by the input end and controlling the acquisition value of the output digital quantity according to the comparison result.
2. The digital quantity acquisition circuit according to claim 1, further comprising a driving protection circuit, wherein the driving protection circuit comprises a passive crystal oscillator Y1, a counter U1, a resistor R3, a diode D5, a triode Q1, a diode D3, a zener diode D4 and a resistor R4; the passive crystal oscillator Y1 is connected with the counter U1, is connected with the resistor R3 in series and then is connected with the base electrode of the triode Q1, the collector electrode of the triode Q1 is connected with the primary side of the transformer, and the emitter electrode of the triode Q1 is connected with the direct-current signal input end; the diode D3, the diode D5, the voltage stabilizing diode D4 and the resistor R4 form a protection circuit, and the protection circuit is used for free flow and voltage stabilizing protection of input signals on the primary side of the transformer.
3. The digital quantity acquisition circuit of claim 1, further comprising a filter protection circuit, wherein the filter protection circuit comprises a voltage dependent resistor (RV 1), a TVS tube (D1), a resistor (R1) and a capacitor (C1); the filter circuit is formed by connecting a resistor R1 and a capacitor C1 in series, the voltage dependent resistor RV1 is connected with the TVS tube D1 and the filter circuit in parallel and then connected with a direct current signal input end, the output end of the filter protection circuit is connected with the primary side of a transformer, and the capacitor C1 is a four-pin capacitor.
4. The digital quantity acquisition circuit according to claim 3, further comprising a zener diode D2, wherein the cathode of the zener diode D2 is connected to one end of the resistor R1, and the anode thereof is connected to one end of the primary side of the transformer; the zener diode D2 and the resistor R1 form a signal voltage divider circuit.
5. The digital quantity acquisition circuit according to claim 1, wherein the signal rectifying and filtering circuit comprises a four-port bridge rectifying circuit, a capacitor C2, a capacitor C3 and a capacitor C4, and a first input end of the bridge rectifying circuit is connected with one end of the secondary side of the transformer through a capacitor C2; the second input end is connected with the other end of the secondary side of the transformer through a capacitor C3; two output ends of the capacitor are connected in parallel with a capacitor C4 grounded GND, and then a direct current voltage signal DI _ S is output.
6. The digital quantity acquisition circuit according to claim 1, wherein the signal detection circuit comprises a resistor R2, a photocoupler U2, a resistor R5; the input end of the photoelectric coupler U2 is connected with the direct current signal input end through a resistor R2, the first output end of the photoelectric coupler U2 is connected with a power supply VCC, the second output end of the photoelectric coupler U2 is grounded GND, and the third output end of the photoelectric coupler U is connected with a resistor R5 connected with the power supply VCC in parallel and then outputs a level signal DI _ C.
7. The digital quantity acquisition circuit as claimed in claim 6, wherein said signal detection circuit outputs a level signal DI _ C in the following manner:
if the direct current signal input end has an input signal, the level signal DI _ C output by the photoelectric coupler U2 is at a high level;
if there is no input signal at the dc signal input terminal, the level signal DI _ C output by the photocoupler U2 is at low level.
8. The digital quantity acquisition circuit of claim 1, wherein the signal decision circuit comprises an exclusive-nor logic circuit U3, a switch driver U4, a switch S1 and a resistor R6 with one end grounded to GND;
the output end of the signal rectifying and filtering circuit is connected to the input end of a conversion driver U4, the output end of a conversion driver U4 is connected to one end of a switch S1, and the other end of the switch S1 is connected with a resistor R6 in parallel and then outputs a digital value acquisition value; the conversion driver U4 is used for converting the dc voltage signal DI _ S into a first logic level signal DI _ S';
the output end of the signal detection circuit and the output end of the signal rectifying and filtering circuit are connected to the input end of the exclusive-nor logic circuit U3, and the output end of the exclusive-nor logic circuit U3 outputs a second logic level signal CTL _ S for controlling the switch S1.
9. The digital quantity acquisition circuit of claim 8 wherein the signal decision circuit further comprises:
a first filter circuit, an input terminal of which is connected to the output terminal of the conversion driver U4, and an output terminal of which is connected to one terminal of the switch S1, and outputs a third logic level signal DI _ P;
and the input end of the second filter circuit is connected with the output end of the exclusive-nor logic circuit U3, and the second filter circuit outputs a fourth logic level signal CTL _ P for controlling the switch S1.
10. A digital quantity acquisition method using the digital quantity acquisition circuit according to any one of claims 1 to 9, characterized by comprising the steps of:
after the input signal is isolated by a transformer and subjected to amplitude conversion, the input signal is rectified and filtered by a signal rectification filter circuit, and a direct current voltage signal DI _ S with stable amplitude is output and transmitted to a signal judgment circuit;
the signal detection circuit detects and isolates an input signal, outputs a level signal DI _ C and transmits the level signal DI _ C to the signal judgment circuit;
the direct current voltage signal DI _ S is converted into a first logic level signal DI _ S' through the signal decision circuit;
the direct current voltage signal DI _ S and the level signal DI _ C are compared through a signal judgment circuit, and the acquisition value of the output digital quantity is controlled according to the comparison result.
11. The digital quantity collecting method as claimed in claim 10, wherein the method of controlling the collected value of the output digital quantity based on the comparison result is:
if the direct current voltage signal DI _ S is consistent with the level signal DI _ C, outputting a first logic level signal DI _ S' as a digital quantity acquisition value;
if the dc voltage signal DI _ S is inconsistent with the level signal DI _ C, a logic "0" is output as the digital value.
12. The digital quantity acquisition method according to claim 10, wherein the input signal is further filter-protected by a filter protection circuit and then input to the primary side of the transformer by a driving protection circuit; the drive protection circuit generates a square wave signal to control an input signal at the primary side of the transformer and carry out follow current and amplitude limiting protection on the input signal.
13. The digital quantity acquisition method according to any one of claims 10 to 12, wherein the signal decision circuit comprises an exclusive or gate logic circuit U3, a conversion driver U4, a switch S1, a resistor R6 with one end grounded to GND, a first filter circuit and a second filter circuit;
the direct current voltage signal DI _ S is converted into a first logic level signal DI _ S' through a conversion driver U4;
the direct current voltage signal DI _ S and the level signal DI _ C are subjected to an exclusive OR operation through an exclusive OR gate logic circuit U3 to generate a second logic level signal CTL _ S;
the first logic level signal DI _ S' is filtered by a first filter circuit to generate a third logic level signal DI _ P;
the second logic level signal CTL _ S is filtered by a second filter circuit to generate a fourth logic level signal CTL _ P;
if the fourth logic level signal CTL _ P is logic "1", the direct current voltage signal DI _ S is consistent with the level signal DI _ C, and at this time, the control switch S1 is closed, and the third logic level signal DI _ P generated by filtering is used as digital quantity acquisition output of the acquisition circuit;
if the fourth logic level signal CTL _ P is logic "0", the dc voltage signal DI _ S is inconsistent with the level signal DI _ C, which indicates that the acquisition circuit is faulty, and at this time, the control switch S1 is turned off, and the logic "0" is used as the digital quantity acquisition output of the acquisition circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010902689.2A CN112003479B (en) | 2020-09-01 | 2020-09-01 | Digital quantity acquisition circuit and acquisition method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010902689.2A CN112003479B (en) | 2020-09-01 | 2020-09-01 | Digital quantity acquisition circuit and acquisition method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112003479A true CN112003479A (en) | 2020-11-27 |
| CN112003479B CN112003479B (en) | 2021-07-30 |
Family
ID=73465541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010902689.2A Active CN112003479B (en) | 2020-09-01 | 2020-09-01 | Digital quantity acquisition circuit and acquisition method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112003479B (en) |
Citations (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101127448A (en) * | 2007-05-16 | 2008-02-20 | 郑德明 | A pulse constant energy charging method and its charging device for lead acid battery |
| CN201243203Y (en) * | 2008-07-25 | 2009-05-20 | 比亚迪股份有限公司 | Safety protection device for electric appliance |
| CN101566832A (en) * | 2009-01-05 | 2009-10-28 | 山东省科学院能源研究所 | Intelligent controller for multifunctional anti-bedsore care bed |
| CN101711067A (en) * | 2009-07-17 | 2010-05-19 | 罗宏基 | LED electroluminescence circuit |
| CN101860017A (en) * | 2010-05-07 | 2010-10-13 | 中国科学院电工研究所 | Control device for high-voltage and high-power power electronic converter system |
| CN201681118U (en) * | 2010-05-27 | 2010-12-22 | 朱晓 | Output current detection device of high voltage electric field and electric potential therapeutic apparatus |
| CN102158100A (en) * | 2011-03-01 | 2011-08-17 | 山东沃森电源设备有限公司 | Triphase variable-frequency power supply with high power and operating method thereof |
| CN102426447A (en) * | 2011-11-30 | 2012-04-25 | 北京工业大学 | Wireless network monitoring system of welding production workshop |
| CN102630112A (en) * | 2011-02-07 | 2012-08-08 | 快捷韩国半导体有限公司 | Led emitting device and driving method thereof |
| WO2012158420A1 (en) * | 2011-05-17 | 2012-11-22 | Zarlink Semiconductor Ab | A signal acquisition circuit for detecting a wanted signal in the presence of an unwanted signal |
| CN103051206A (en) * | 2012-12-13 | 2013-04-17 | 深圳和而泰智能控制股份有限公司 | Control circuit and device of power source of fresh keeping machine and control method thereof |
| CN103166714A (en) * | 2013-02-22 | 2013-06-19 | 青岛海信宽带多媒体技术有限公司 | Signal detection device based on burst mode photoreceiver |
| CN103279109A (en) * | 2013-06-09 | 2013-09-04 | 南车株洲电力机车研究所有限公司 | Locomotive digital value collecting device based on MVB bus |
| CN103529375A (en) * | 2012-07-02 | 2014-01-22 | 鸿富锦精密工业（深圳）有限公司 | Testing apparatus |
| CN103595473A (en) * | 2013-06-04 | 2014-02-19 | 青岛海信宽带多媒体技术有限公司 | Burst mode reception control circuit and burst mode light receiver |
| CN104228878A (en) * | 2014-09-19 | 2014-12-24 | 南车株洲电力机车有限公司 | Locomotive unmanned vigilance device |
| CN105244981A (en) * | 2015-11-20 | 2016-01-13 | 深圳市祝你快乐科技有限公司 | Energy saving charger capable of automatic power cutoff |
| CN105322802A (en) * | 2014-08-01 | 2016-02-10 | 罗姆股份有限公司 | Feedback circuit, DC/DC converter, controller, power adapter, and electronic device |
| CN105404199A (en) * | 2015-11-12 | 2016-03-16 | 中国南方电网有限责任公司 | Self-detection circuit for implementing digital input circuit based on pulse injection method |
| CN205280114U (en) * | 2015-12-29 | 2016-06-01 | 上海大郡动力控制技术有限公司 | Electric automobile electrical resolver decoding circuit output signal accuracy testing system |
| CN105774569A (en) * | 2016-03-11 | 2016-07-20 | 中车青岛四方车辆研究所有限公司 | Rail vehicle traction inverter system and method for integrated energy storage device charging and discharging control |
| EP3093720A1 (en) * | 2015-05-12 | 2016-11-16 | Pepperl & Fuchs GmbH | Galvanically isolated current transmitter with self-adjustment on recognition of operating conditions |
| CN106374727A (en) * | 2016-10-08 | 2017-02-01 | 北京精密机电控制设备研究所 | High-reliability IGBT (Insulated Gate Bipolar Transistor) parallel control device |
| CN205986812U (en) * | 2016-08-30 | 2017-02-22 | 厦门金欣荣电子科技有限公司 | Solid state relay |
| CN207689130U (en) * | 2018-01-17 | 2018-08-03 | 成都思凯诺克科技有限公司 | Engine fuel flow electric adjuster tester adapter |
| CN108923657A (en) * | 2018-07-02 | 2018-11-30 | 杭州茂力半导体技术有限公司 | Controlled resonant converter and its control circuit and control method |
| CN108919783A (en) * | 2018-07-13 | 2018-11-30 | 中车青岛四方机车车辆股份有限公司 | A kind of driving mechanism trouble-shooter and method |
| CN208984709U (en) * | 2018-08-16 | 2019-06-14 | 九阳股份有限公司 | A kind of voltage detecting circuit |
| DE102018200120A1 (en) * | 2018-01-05 | 2019-07-11 | Kuka Deutschland Gmbh | Safety control with at least one semiconductor switching contact |
| CN110501939A (en) * | 2019-08-02 | 2019-11-26 | 国网浙江省电力有限公司嘉兴供电公司 | A kind of transformer fault early warning system and its control method based on electric power Internet of Things |
| CN111313365A (en) * | 2020-03-30 | 2020-06-19 | 福州京东方光电科技有限公司 | Overvoltage protection circuit, overvoltage protection method and display device |
-
2020
- 2020-09-01 CN CN202010902689.2A patent/CN112003479B/en active Active
Patent Citations (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101127448A (en) * | 2007-05-16 | 2008-02-20 | 郑德明 | A pulse constant energy charging method and its charging device for lead acid battery |
| CN201243203Y (en) * | 2008-07-25 | 2009-05-20 | 比亚迪股份有限公司 | Safety protection device for electric appliance |
| CN101566832A (en) * | 2009-01-05 | 2009-10-28 | 山东省科学院能源研究所 | Intelligent controller for multifunctional anti-bedsore care bed |
| CN101711067A (en) * | 2009-07-17 | 2010-05-19 | 罗宏基 | LED electroluminescence circuit |
| CN101860017A (en) * | 2010-05-07 | 2010-10-13 | 中国科学院电工研究所 | Control device for high-voltage and high-power power electronic converter system |
| CN201681118U (en) * | 2010-05-27 | 2010-12-22 | 朱晓 | Output current detection device of high voltage electric field and electric potential therapeutic apparatus |
| CN102630112A (en) * | 2011-02-07 | 2012-08-08 | 快捷韩国半导体有限公司 | Led emitting device and driving method thereof |
| CN102158100A (en) * | 2011-03-01 | 2011-08-17 | 山东沃森电源设备有限公司 | Triphase variable-frequency power supply with high power and operating method thereof |
| WO2012158420A1 (en) * | 2011-05-17 | 2012-11-22 | Zarlink Semiconductor Ab | A signal acquisition circuit for detecting a wanted signal in the presence of an unwanted signal |
| CN102426447A (en) * | 2011-11-30 | 2012-04-25 | 北京工业大学 | Wireless network monitoring system of welding production workshop |
| CN103529375A (en) * | 2012-07-02 | 2014-01-22 | 鸿富锦精密工业（深圳）有限公司 | Testing apparatus |
| CN103051206A (en) * | 2012-12-13 | 2013-04-17 | 深圳和而泰智能控制股份有限公司 | Control circuit and device of power source of fresh keeping machine and control method thereof |
| CN103166714A (en) * | 2013-02-22 | 2013-06-19 | 青岛海信宽带多媒体技术有限公司 | Signal detection device based on burst mode photoreceiver |
| CN103595473A (en) * | 2013-06-04 | 2014-02-19 | 青岛海信宽带多媒体技术有限公司 | Burst mode reception control circuit and burst mode light receiver |
| CN103279109A (en) * | 2013-06-09 | 2013-09-04 | 南车株洲电力机车研究所有限公司 | Locomotive digital value collecting device based on MVB bus |
| CN105322802A (en) * | 2014-08-01 | 2016-02-10 | 罗姆股份有限公司 | Feedback circuit, DC/DC converter, controller, power adapter, and electronic device |
| CN104228878A (en) * | 2014-09-19 | 2014-12-24 | 南车株洲电力机车有限公司 | Locomotive unmanned vigilance device |
| EP3093720A1 (en) * | 2015-05-12 | 2016-11-16 | Pepperl & Fuchs GmbH | Galvanically isolated current transmitter with self-adjustment on recognition of operating conditions |
| CN105404199A (en) * | 2015-11-12 | 2016-03-16 | 中国南方电网有限责任公司 | Self-detection circuit for implementing digital input circuit based on pulse injection method |
| CN105244981A (en) * | 2015-11-20 | 2016-01-13 | 深圳市祝你快乐科技有限公司 | Energy saving charger capable of automatic power cutoff |
| CN205280114U (en) * | 2015-12-29 | 2016-06-01 | 上海大郡动力控制技术有限公司 | Electric automobile electrical resolver decoding circuit output signal accuracy testing system |
| CN105774569A (en) * | 2016-03-11 | 2016-07-20 | 中车青岛四方车辆研究所有限公司 | Rail vehicle traction inverter system and method for integrated energy storage device charging and discharging control |
| CN205986812U (en) * | 2016-08-30 | 2017-02-22 | 厦门金欣荣电子科技有限公司 | Solid state relay |
| CN106374727A (en) * | 2016-10-08 | 2017-02-01 | 北京精密机电控制设备研究所 | High-reliability IGBT (Insulated Gate Bipolar Transistor) parallel control device |
| DE102018200120A1 (en) * | 2018-01-05 | 2019-07-11 | Kuka Deutschland Gmbh | Safety control with at least one semiconductor switching contact |
| CN207689130U (en) * | 2018-01-17 | 2018-08-03 | 成都思凯诺克科技有限公司 | Engine fuel flow electric adjuster tester adapter |
| CN108923657A (en) * | 2018-07-02 | 2018-11-30 | 杭州茂力半导体技术有限公司 | Controlled resonant converter and its control circuit and control method |
| CN108919783A (en) * | 2018-07-13 | 2018-11-30 | 中车青岛四方机车车辆股份有限公司 | A kind of driving mechanism trouble-shooter and method |
| CN208984709U (en) * | 2018-08-16 | 2019-06-14 | 九阳股份有限公司 | A kind of voltage detecting circuit |
| CN110501939A (en) * | 2019-08-02 | 2019-11-26 | 国网浙江省电力有限公司嘉兴供电公司 | A kind of transformer fault early warning system and its control method based on electric power Internet of Things |
| CN111313365A (en) * | 2020-03-30 | 2020-06-19 | 福州京东方光电科技有限公司 | Overvoltage protection circuit, overvoltage protection method and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112003479B (en) | 2021-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102426302B (en) | Three-phase power input open-phase detection circuit | |
| CN100566068C (en) | Hardware overvoltage breaking-off circuit | |
| CN104821708A (en) | Circuit structure improving EFT noise immunity of primary-side feedback power supply system | |
| CN201438208U (en) | Online detecting device of on-off control return circuit of circuit breaker | |
| US20150260773A1 (en) | Phase sequence detection | |
| CN108037377A (en) | A kind of method and circuit for detecting three-phase alternating-current supply phase shortage | |
| CN203368336U (en) | Frequency converter | |
| CN102299617B (en) | Automatic voltage switch and implementation method thereof | |
| CN112003479B (en) | Digital quantity acquisition circuit and acquisition method | |
| CN103529281A (en) | Voltage detection circuit with functions of complete coverage and real-time self-diagnosis, electronic equipment and automobile | |
| CN108462147A (en) | A kind of startup power supply short-circuit protection detection circuit and its detection method | |
| CN111929501B (en) | Insulation resistance change detection circuit, insulation detection system and method | |
| CN105093048A (en) | Port detection system and vehicle possessing same | |
| CN215067144U (en) | Relay adhesion detection circuit | |
| CN214314521U (en) | Device capable of effectively reducing misoperation of leakage protector | |
| CN112670949A (en) | Residual current tripping control method and residual current tripper | |
| CN113740595A (en) | Single-phase alternating current voltage detection protection circuit based on mutual inductor | |
| CN109041311B (en) | Self-adaptive digital phase-locked controller | |
| CN210270556U (en) | Remote measurement and control terminal | |
| CN210347896U (en) | Low-power consumption flow measurement data acquisition equipment prevents broken string detection circuitry | |
| CN107453318B (en) | A kind of electric car power supply unit smart grounding failure to trip protective device | |
| CN103197260B (en) | Photoelectrical coupler degeneration monitoring method and device in Switching Power Supply | |
| CN111999568A (en) | Three-phase input open-phase detection system for variable frequency driver | |
| CN214280917U (en) | Residual current release | |
| CN113514760A (en) | Detection circuit, detection method applicable to detection circuit and uninterruptible power system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |