CN115319240A - Multi-input signal detection system and method and inverter welding machine - Google Patents
Multi-input signal detection system and method and inverter welding machine Download PDFInfo
- Publication number
- CN115319240A CN115319240A CN202210868032.8A CN202210868032A CN115319240A CN 115319240 A CN115319240 A CN 115319240A CN 202210868032 A CN202210868032 A CN 202210868032A CN 115319240 A CN115319240 A CN 115319240A
- Authority
- CN
- China
- Prior art keywords
- signal
- output
- diode
- input
- resistor
- 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.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1043—Power supply characterised by the electric circuit
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
Abstract
The invention discloses a detection system of multiple input signals, which is applied to an inverter welding machine and comprises a signal detection port, a time sequence control module and a plurality of signal output ports, wherein the signal detection port is suitable for receiving a plurality of voltage signals simultaneously input by the plurality of signal input modules, the time sequence control module is suitable for controlling the plurality of signal output ports to output pulse width driving signals with different time sequences, and the plurality of signal output ports are respectively connected to signal input ends of the plurality of signal input modules so as to control the input signals of the plurality of signal input modules to be switched on or switched off according to the pulse width driving signals. The scheme can acquire signals of multiple input signals through one signal detection port, and can solve the problems of high detection cost and poor anti-interference performance of multiple signals when the number of the signal detection ports of the chip device is limited.
Description
Technical Field
The invention relates to the technical field of signal detection, in particular to a system and a method for detecting multiple input signals and an inverter welding machine.
Background
The inverter welding machine is an arc welding power supply adopting an inverter technology, which rectifies and filters three-phase or single-phase 50Hz power frequency alternating current to obtain smoother direct current, an inverter circuit consisting of IGBT tubes converts the direct current into 15-100 kHz alternating current, the alternating current is reduced by an intermediate frequency main transformer, and then the alternating current is rectified and filtered again to obtain stable direct current output welding current or is inverted again to output the alternating current with required frequency.
The inverter welding machine is essentially a switching power supply with special output characteristics, has large output power and complex working environment, and needs to detect various signals such as welding temperature, welding voltage and the like in real time in actual production. However, the detection of multiple signals usually requires that the chip has multiple detection ports, and at present, when the number of signal detection ports of a single chip or an integrated circuit chip cannot meet the number of input signals, the mode of adding chips is usually adopted, and the detection of multiple input signals is met through mutual communication and cooperation among the chips. But the method has high cost and poor interference resistance.
Therefore, there is a need for a multiple-input signal detection system, which can detect multiple input signals without adding chips, reduce the cost and signal interference, and improve the reliability of signal detection, so as to solve the above problems in the prior art.
Disclosure of Invention
In view of the above, the present invention has been made to provide a multiple input signal detection system, method and inverter welder that overcomes or at least partially solves the above problems.
According to one aspect of the invention, a multi-input signal detection system is provided, which can be applied to an inverter welding machine and comprises a signal detection port, a plurality of signal output ports and a time sequence control module. The signal detection port can receive a plurality of voltage or current signals input by a plurality of signal input modules simultaneously; the time sequence control module can control a plurality of signal output ports to output pulse width driving signals with different time sequences; the plurality of signal output ports are respectively connected to the plurality of signal input modules so as to control the input signals of the plurality of signal input modules to be switched on or switched off according to the pulse width driving signals.
The multi-input signal detection system provided by the invention outputs a plurality of driving waveforms with different time sequences through time sequence control, staggers the phase sequence of various input signals at different time intervals, and performs sampling operation processing on different input signals at different time intervals in a sampling period, thereby avoiding interference among the signals; by intermittently sampling a plurality of input signals, a plurality of signals can be detected by only one signal detection port, and the aim of real-time adjustment is fulfilled.
Optionally, the timing control module may perform sampling operation on a voltage or current signal given by the signal input module to obtain a signal detection result.
Optionally, the plurality of signal input modules includes a welding voltage adjustment unit, a welding wire feed speed adjustment unit, an ambient temperature control unit, a first device temperature control unit, and a second device temperature control unit. A given signal of the welding voltage adjusting unit is connected to the signal detection port through a first diode and an interface circuit; a given signal of the welding wire feeding speed regulating unit is connected to the signal detection port through a second diode and an interface circuit; a given signal of the ambient temperature control unit is connected to the signal detection port through a third diode and an interface circuit; the given signal of the first device temperature control unit is connected to the signal detection port through a fourth diode and an interface circuit, and the given signal of the second device temperature control unit is connected to the signal detection port through a fifth diode and an interface circuit.
Optionally, the plurality of signal output ports includes a first output port, a second output port, a third output port, a fourth output port, and a fifth output port; the first output port is connected to the positive input end of the first diode through a first resistor and a first switching device; the second output port is connected to the positive input end of the second diode through a second resistor and a second switching device; the third output port is connected to the positive input end of the third diode through a third resistor and a third switching device; the fourth output port is connected to the positive input end of the fourth diode through a fourth resistor and a fourth switching device; the fifth output port is connected to the positive input terminal of the fifth diode through a fifth resistor and a fifth switching device.
Optionally, a collector of the first switching device is connected to the positive input end of the first diode, a base of the first switching device is connected to the first resistor, and an emitter of the first switching device is grounded; the collector of the second switching device is connected with the positive input end of the second diode, the base of the second switching device is connected with the second resistor, and the emitter of the second switching device is grounded; the collector of the third switching device is connected with the positive input end of the third diode, the base of the third switching device is connected with the third resistor, and the emitter of the third switching device is grounded; a collector of the fourth switching device is connected with a positive input end of the fourth diode, a base of the fourth switching device is connected with the fourth resistor, and an emitter of the fourth switching device is grounded; the collector of the fifth switching device is connected with the positive input end of the fifth diode, the base of the fifth switching device is connected with the fifth resistor, and the emitter of the fifth switching device is grounded.
Optionally, the interface circuit may divide and filter a voltage or current signal given by the plurality of signal input modules, and the interface circuit includes a first dividing resistor, a second dividing resistor, a filtering capacitor, and a sampling resistor. The filter capacitor is connected in parallel at two ends of the second divider resistor, the first divider resistor is connected with the common negative input end of the first diode, the second diode, the third diode, the fourth diode and the fifth diode, one end of the second divider resistor is connected with the first divider resistor, the other end of the second divider resistor is grounded, one end of the sampling resistor is connected with the signal detection port, and the other end of the sampling resistor is connected with the filter capacitor.
Optionally, when the first output port outputs a low-level signal and the second output port, the third output port, the fourth output port, and the fifth output port output a high-level signal, the signal detection port may perform sampling operation processing on a signal given by the welding voltage adjustment unit;
when the second output port outputs a low level signal and the first output port, the third output port, the fourth output port and the fifth output port output a high level signal, the signal detection port can perform sampling operation processing on a signal given by the welding wire feeding speed adjusting unit;
when the third output port outputs a low-level signal and the first output port, the second output port, the fourth output port and the fifth output port output a high-level signal, the signal detection port can perform sampling operation processing on a voltage signal given by the environment temperature control unit;
when the fourth output port outputs a low-level signal and the first, second, third and fifth output ports output a high-level signal, the signal detection port may perform sampling operation processing on a voltage signal given by the first device temperature control unit;
when the fifth output port outputs a low level signal and the first output port, the second output port, the third output port and the fourth output port output a high level signal, the signal detection port is suitable for performing sampling operation processing on a voltage signal given by the second device temperature control unit.
Therefore, different input signals are respectively subjected to sampling operation processing in different time periods in one sampling period, and a plurality of inputs can be simultaneously detected through intermittent sampling processing, so that the aim of real-time adjustment of the signals is fulfilled.
According to another aspect of the present invention, there is provided a multi-input signal detecting method, in which first, a plurality of signals to be detected simultaneously input by a plurality of signal input modules are received; and then, controlling a plurality of signal output ports correspondingly connected with the plurality of signal input modules to output pulse width driving signals with different time sequences, and controlling the input signals of the plurality of signal input modules to be switched on or switched off according to the pulse width driving signals.
Optionally, in the above method, when the pulse width driving signal output by any one of the plurality of signal output ports is at a low level and the pulse width driving signals output by the remaining signal output ports are at a high level, the signal input module connected to the signal output port at which the pulse width driving signal output is at the low level is turned on; and carrying out sampling operation processing on the signal input module which is conducted by the signal to obtain a signal detection result.
According to another aspect of the present invention, there is provided an inverter welding machine, including the multiple-input signal detection system as described above, configured to perform time-division sampling operation on multiple voltage or current signals to be detected connected to the inverter welding machine through controlling the timing of the pulse width driving signal output by the signal output port, so as to obtain a signal detection result.
According to the scheme of the invention, when the number of the chip signal detection ports is limited and the number of the signals to be detected is large, the driving signals are output through time sequence control, a plurality of input signals are detected at different time sequences in different time periods, the time sequence detection circuit performs intermittent sampling operation processing, and the plurality of signals can be detected only by one signal detection port. The scheme can reduce the detection cost of various signal detection, improve the reliability of the signal detection and avoid the mutual interference between signals.
The above description is only an overview of the technical solutions of the present invention, and the present invention can be implemented in accordance with the content of the description so as to make the technical means of the present invention more clearly understood, and the above and other objects, features, and advantages of the present invention will be more clearly understood.
Drawings
Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 illustrates a functional block diagram of a multiple input signal detection system 100 according to one embodiment of the present invention;
FIG. 2 illustrates a circuit schematic of a multiple input signal detection system according to one embodiment of the present invention;
FIG. 3 illustrates a pulse width drive signal schematic output by the signal output port according to one embodiment of the present invention;
FIG. 4 shows a schematic diagram of an input signal waveform according to one embodiment of the invention;
fig. 5 shows a flow diagram of a method 500 for detecting multiple input signals according to an embodiment of the invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Integrated circuits that integrate analog and digital circuits on a single chip for analog-to-digital or digital-to-analog conversion are small and inexpensive, but need to avoid signal collision and interference. The arc welding power source using inversion technique is called inversion welding machine, the control circuit of inversion welding equipment is formed from given circuit and driving circuit, and utilizes the feedback of voltage and current signal to make treatment, and adopts pulse width modulation signal to implement complete machine circulation control. However, when the inverter welding machine has more feedback signal inputs and the number of the chip signal detection ports is limited, in order to meet the detection of various input signals, the scheme provides the multi-input signal detection system, so that the acquisition of the multi-input signals can be met under the condition that the number of chips or input ports is not increased, the signal detection cost is reduced, and the signal anti-interference capability is improved.
Fig. 1 illustrates a functional block diagram of a multiple input signal detection system 100 according to one embodiment of the present invention. As shown in FIG. 1, the system 100 includes a timing control module, a plurality of signal input modules 1-n. The signal input modules 1-n simultaneously input the input signals IN1-INn into the time sequence control module, the time sequence control module outputs pulse width driving signals with different time sequences by controlling signal output ports respectively correspondingly connected with the signal input modules 1-n, and respectively correspondingly controls the on or off of the input signals IN1-INn, so that different input signals are acquired IN different time periods IN a sampling period.
Fig. 2 shows a schematic circuit diagram of a multiple-input signal detection system according to an embodiment of the present invention. As shown in fig. 2, the multiple-input signal detection system includes one signal detection port IREF, a plurality of signal output ports (OUT 1, OUT2, OUT3, OUT4, OUT 5) and a timing control module, wherein the signal detection port can receive a plurality of voltage or current signals input by the plurality of signal input modules at the same time, and the timing control module can control the signal output ports (OUT 1, OUT2, OUT3, OUT4, OUT 5) to output pulse width driving signals with different timings. The signal output ports (OUT 1, OUT2, OUT3, OUT4, OUT 5) are respectively connected to the plurality of signal input modules so as to control the input signals of the plurality of signal input modules to be switched on or switched off according to the pulse width driving signals with different time sequences.
In one embodiment of the present invention, the signal input module may include a welding voltage adjustment unit VR1, a welding wire feed speed adjustment unit VR2, an ambient temperature control unit TR1, a first device temperature control unit TR2, and a second device temperature control unit TR3. A given voltage signal of the welding voltage adjusting unit VR1 is connected to the signal detection port IREF through a first diode D1 and an interface circuit, a given voltage signal of the welding wire feed speed adjusting unit VR2 is connected to the signal detection port IREF through a second diode D2 and an interface circuit, a given voltage signal of the ambient temperature control unit TR1 is connected to the signal detection port IREF through a third diode D3 and an interface circuit, a given signal of the first device temperature control unit TR2 is connected to the signal detection port IREF through a fourth diode D4 and an interface circuit, and a given signal of the second device temperature control unit TR3 is connected to the signal detection port IREF through a fifth diode D5 and an interface circuit.
As shown in fig. 2, the interface circuit includes a first voltage-dividing resistor R2, a second voltage-dividing resistor R3, a filter capacitor C2, and a sampling resistor R1, where the filter capacitor C2 is connected in parallel to two ends of the second voltage-dividing resistor R3, the first voltage-dividing resistor R2 is connected to common negative input ends of the first diode D1, the second diode D2, the third diode D3, the fourth diode D4, and the fifth diode D5, one end of the second voltage-dividing resistor R3 is connected to the first voltage-dividing resistor R2, the other end of the second voltage-dividing resistor R3 is grounded to GND, one end of the sampling resistor R1 is connected to the signal detection port IREF, and the other end of the sampling resistor R1 is connected to the filter capacitor C2.
As shown in fig. 2, the first output port OUT1 is connected to the positive input terminal of the first diode D1 through the first resistor R8 and the first switching device Q1, the second output port OUT2 is connected to the positive input terminal of the second diode D2 through the second resistor R10 and the second switching device Q2, the third output port OUT3 is connected to the positive input terminal of the third diode D3 through the third resistor R11 and the third switching device Q3, the fourth output port OUT4 is connected to the positive input terminal of the fourth diode D4 through the fourth resistor R9 and the fourth switching device Q4, and the fifth output port OUT5 is connected to the positive input terminal of the fifth diode D5 through the fifth resistor R7 and the fifth switching device Q5. The collector of the first switching device Q1 is connected with the positive input end of the first diode D1, the base of the first switching device Q1 is connected with the first resistor R8, and the emitter of the first switching device is grounded; the collector of the second switching device Q2 is connected with the positive input end of the second diode D2, the base of the second switching device Q2 is connected with the second resistor R10, and the emitter of the second switching device D2 is grounded; the collector of the third switching device Q3 is connected to the positive input end of the third diode D3, the base of the third switching device Q3 is connected to the third resistor R11, and the emitter of the third switching device D3 is grounded; a collector of the fourth switching device Q4 is connected to the positive input end of the fourth diode D4, a base of the fourth switching device D4 is connected to the fourth resistor R9, and an emitter of the fourth switching device D4 is grounded; the collector of the fifth switching device Q5 is connected to the positive input end of the fifth diode D5, the base of the fifth switching device Q5 is connected to the fifth resistor R7, and the emitter of the fifth switching device D5 is grounded.
In order to perform acquisition operation processing on different input signals at different time intervals in a sampling period, the timing control module is required to control different signal output ports to output pulse width driving signals with different timings. Specifically, when the first output port OUT1 outputs a low-level signal and the second output port OUT2, the third output port OUT3, the fourth output port OUT4, and the fifth output port OUT5 outputs a high-level signal, the signal detection port IREF is adapted to perform sampling operation processing on a voltage signal given by the welding voltage adjustment unit VR 1. When the second output port OUT2 outputs a low level signal and the first output port OUT1, the third output port OUT3, the fourth output port OUT4 and the fifth output port OUT5 output a high level signal, the signal detection port IREF is adapted to perform sampling operation processing on a voltage signal given by the welding wire feed speed adjustment unit VR 2. When the third output port OUT3 outputs a low-level signal and the first, second, fourth and fifth output ports OUT1, OUT2, OUT4, OUT5 output a high-level signal, the signal detection port IREF is adapted to perform sampling operation processing on the voltage signal given by the ambient temperature control unit TR 1. When the fourth output port OUT4 outputs a low-level signal and the first, second, third and fifth output ports OUT1, OUT2, OUT3 and OUT5 output a high-level signal, the signal detection port IREF is adapted to perform sampling operation processing on the voltage signal given by the first device temperature control unit TR 2. When the fifth output port OUT5 outputs a low-level signal and the first, second, third and fourth output ports OUT1, OUT2, OUT3, OUT4 output a high-level signal, the signal detection port IREF is adapted to perform sampling operation processing on the voltage signal given by the second device temperature control unit TR3.
Fig. 3 shows a schematic diagram of a pulse width driving signal output from a signal output port according to an embodiment of the invention. As shown IN fig. 3, when OUT1 is low, OUT1 outputs a low level signal, and OUT2, OUT3, OUT4, and OUT5 outputs a high level signal, the IN1 input given signal is sampled, 10 signal acquisitions can be performed within 1S, the acquisition time is 15ms, and 5ms idle time is left without acquisition (20ms × 5 groups × 10 =1000ms = 1s). When welding voltage is adjusted, a given potential correspondingly changes, the corresponding triode Q1 does not work, when IN1 voltage is not pulled down, the triodes Q2, Q3, Q4 and Q5 are pulled down to work, the voltage of an input signal IN1 is connected to one end of a resistor R2 through a diode D1, the other end of the resistor R3 and a resistor R3 form proportional voltage division, the other end of the resistor R3 is grounded, a capacitor C2 is connected to two ends of the resistor R3 IN parallel to play a filtering role, an IREF signal is given to a time sequence control circuit after the resistor R1 passes through, constant sampling operation processing is carried out on the given welding voltage, one period is 100ms, and each corresponding sampling time is 15ms.
When OUT2 is output as a low level signal and OUT1, OUT3, OUT4, and OUT5 are output as high level signals, sampling operation processing is performed on the IN2 input given signal, 10 signal sampling can be performed within 1S, the acquisition time is 15ms, and there is 5ms idle time without acquisition (20ms × 5 groups × 10 =1000ms = 1s). When the welding wire feeding speed is adjusted, the given potential correspondingly changes, the corresponding triode Q2 does not work, when the IN2 voltage is not pulled down, the triodes Q1, Q3, Q4 and Q5 are pulled down to work, the voltage of an input signal IN2 is connected to one end of a resistor R2 through a diode D2, the other end of the resistor R3 and the resistor R3 form proportional voltage division, the other end of the resistor R3 is grounded, a capacitor C2 is connected to the two ends of the resistor R3 IN parallel to play a filtering role, an IREF signal is given to a time sequence control circuit after passing through the resistor R1, the welding wire feeding speed adjusting signal is subjected to sampling operation processing, one period is 100ms, and each corresponding sampling time is 15ms.
When OUT3 is output as a low-level signal and OUT1, OUT2, OUT4, and OUT5 are output as high-level signals, sampling operation processing is performed on the IN3 input given signal, 10 signal samples can be performed within 1S, the acquisition time is 15ms, and 5ms idle time is left without acquisition (20ms × 5 groups × 10 =1000ms = 1s). When the environment temperature control point 1 is IN use, the given potential changes correspondingly, the corresponding triode Q3 does not work, when the IN3 voltage is not pulled down, the triodes Q1, Q2, Q4 and Q5 are pulled down to work, the voltage of an input signal IN3 is connected to one end of a resistor R2 through a diode D3, the other end of the resistor R3 and a resistor R3 form proportional voltage division, the other end of the resistor R3 is grounded, a capacitor C2 is connected to the two ends of the resistor R3 IN parallel to play a filtering role, an IREF signal is given to a timing control circuit after passing through the resistor R1, the signal of the environment temperature control point 1 is subjected to sampling operation IN real time, one period is 100ms, and each corresponding sampling time is 15ms.
When OUT4 is output as a low-level signal and OUT1, OUT2, OUT3, and OUT5 are output as high-level signals, sampling operation processing is performed on the IN4 input given signal, 10 signal samples can be performed within 1S, the acquisition time is 15ms, and 5ms idle time is left without acquisition (20ms × 5 groups × 10 =1000ms = 1s). When a key device temperature control point 2 is IN use, the given potential changes correspondingly, the corresponding triode Q4 does not work, when the IN4 voltage is not pulled down, the triodes Q1, Q2, Q3 and Q5 are pulled down to work, the voltage of an input signal IN4 is connected to one end of a resistor R2 through a diode D4, the other end of the resistor R3 and the resistor R3 form proportional voltage division, the other end of the resistor R3 is grounded, a capacitor C2 is connected to the two ends of the resistor R3 IN parallel to play a filtering role, an IREF signal is given to a timing control circuit after passing through the resistor R1, the signal of the key device temperature control point 2 is subjected to real-time sampling operation processing, one period is 100ms, and each corresponding sampling time is 15ms.
When OUT5 is output as a low-level signal and OUT1, OUT2, OUT3, and OUT4 are output as high-level signals, sampling operation processing is performed on the IN5 input given signal, 10 signal samples can be performed within 1S, the acquisition time is 15ms, and 5ms idle time is left without acquisition (20ms × 5 groups × 10 =1000ms = 1s). When a key device temperature control point 3 is used, the given potential changes correspondingly, the corresponding triode Q5 does not work, when the IN5 voltage is not pulled down, the triodes Q1, Q2, Q3 and Q4 are pulled down to work, the voltage of an input signal IN5 is connected to one end of a resistor R2 through a diode D5, the other end of the resistor R3 and the resistor R3 form proportional voltage division, the other end of the resistor R3 is grounded, a capacitor C2 is connected to the two ends of the resistor R3 IN parallel to play a filtering role, an IREF signal is given to a timing control circuit after passing through the resistor R1, real-time sampling operation processing is carried out on the key device temperature control point 3 signal, one period is 100ms, and each corresponding sampling time is 15ms.
FIG. 4 shows a schematic diagram of input signal sample timing waveforms according to one embodiment of the present invention. As shown IN fig. 4, IN1, IN2, IN3, IN4, IN5 are sampled at different periods within one sampling period, avoiding interference between the input signals. And there is a small idle time between every two signals. IN an embodiment of the present invention, 10 signal samples can be performed within 1 second, each sampling time is 15ms, and the sampling time interval has 5ms idle time (20ms × 5 groups × 10 times =1000ms = 1s), and 5 groups of pulse width output driving control waveforms of OUT1 to OUT5 are output by timing control, and respectively control and input given signals IN1 to IN5.
The invention also provides a multi-input signal detection method, which can perform signal sampling processing on a plurality of input signals at different time intervals through time sequence control. Fig. 5 shows a flow diagram of a multiple input signal detection method 500 according to one embodiment of the invention. As shown in fig. 5, the method 500 begins with step S510, receiving a plurality of signals to be detected simultaneously inputted by a plurality of signal input modules.
The signal input module can be a voltage signal and a current signal which need to be monitored in real time, and can be signals detected by various sensors, such as signals of temperature, pressure, speed and the like which need to be adjusted or controlled in real time. For an inverter welder, the signal input module may include a welding voltage set signal input module, a welding wire feed speed set signal input module, an ambient temperature control set signal input module, a critical device temperature control set signal input module, and the like. The signal to be detected may need to be monitored simultaneously, and a plurality of signal input modules may be connected to the same signal detection port.
Then, step S520 is executed to control the plurality of signal output ports correspondingly connected to the plurality of signal input modules to output pulse width driving signals with different timings, and control the input signals of the plurality of signal input modules to be turned on or off according to the pulse width driving signals.
In the embodiment of the invention, in order to detect a plurality of signals in one sampling period, the output ports are connected to different signal input modules, so that the signal input modules are controlled to be conducted at different time sequences through time sequence control, and therefore, the detection of the input given signal is respectively and correspondingly controlled by outputting pulse width driving signals at different time sequences. Specifically, when the pulse width driving signal output by any one of the signal output ports is at a low level and the pulse width driving signals output by the other signal output ports are at a high level, the signal input module connected to the signal output port at which the pulse width driving signal output is at the low level is in signal conduction; and carrying out sampling operation processing on the signal input module which is conducted by the signal to obtain a signal detection result.
The detection system and the detection method of the multiple input signals can be applied to an inverter welding machine, the time sequence of pulse width driving signals is output through a control signal output port, and the time-interval sampling operation processing is carried out on a plurality of voltage or current signals to be detected connected with the inverter welding machine to obtain a signal detection result, so that the sampling operation processing is carried out on the plurality of signals to be detected of the inverter welding machine, and signals such as welding voltage, welding wire feeding speed, temperature and the like are maintained in a preset state.
Through the scheme, under the condition that the number of the chip signal detection ports is limited and the number of the signals to be detected is large, the driving signals are output through time sequence control, multiple input signals are detected at different time sequences in different time periods, the time sequence detection circuit performs intermittent sampling operation processing, and the multiple signals can be detected only through one signal detection port. The scheme can reduce the detection cost of various signal detection, improve the reliability of the signal detection and avoid the mutual interference between signals.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules or units or components of the devices in the examples disclosed herein may be arranged in a device as described in this embodiment or alternatively may be located in one or more devices different from the devices in this example. The modules in the foregoing examples may be combined into one module or may additionally be divided into multiple sub-modules.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
Furthermore, some of the described embodiments are described herein as a method or combination of method elements that can be performed by a processor of a computer system or by other means of performing the described functions. A processor with the necessary instructions for carrying out the method or the method elements thus forms a device for carrying out the method or the method elements. Further, the elements of the apparatus embodiments described herein are examples of the following apparatus: the apparatus is used to implement the functions performed by the elements for the purpose of carrying out the invention.
As used herein, unless otherwise specified the use of the ordinal adjectives "first", "second", "third", etc., to describe a common object, merely indicate that different instances of like objects are being referred to, and are not intended to imply that the objects so described must be in a given sequence, either temporally, spatially, in ranking, or in any other manner.
While the invention has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of this description, will appreciate that other embodiments can be devised which do not depart from the scope of the invention as disclosed herein. Furthermore, it should be noted that the language used in the specification has been principally selected for readability and instructional purposes, and may not have been selected to delineate or circumscribe the inventive subject matter.
Accordingly, many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the appended claims. The present invention has been disclosed in an illustrative rather than a restrictive sense with respect to the scope of the invention, as defined in the appended claims.
Claims (10)
1. The detection system of the multiple input signals is applied to an inverter welding machine and is characterized by comprising a signal detection port, a plurality of signal output ports and a time sequence control module, wherein the signal detection port is suitable for receiving a plurality of voltage or current signals input by the signal input modules at the same time, the time sequence control module is suitable for controlling the signal output ports to output pulse width driving signals with different time sequences, and the signal output ports are respectively connected to the signal input modules so as to control the input signals of the signal input modules to be switched on or switched off according to the pulse width driving signals.
2. The system of claim 1, wherein the timing control module is further adapted to perform sampling operation on the voltage or current signal given by the signal input module to obtain a signal detection result.
3. The system of claim 1, wherein the plurality of signal input modules comprises a welding voltage regulation unit, a welding wire feed speed regulation unit, an ambient temperature control unit, a first device temperature control unit, and a second device temperature control unit, a given signal of the welding voltage regulation unit is connected to the signal detection port through a first diode and interface circuitry, a given signal of the welding wire feed speed regulation unit is connected to the signal detection port through a second diode and interface circuitry, a given signal of the ambient temperature control unit is connected to the signal detection port through a third diode and interface circuitry, a given signal of the first device temperature control unit is connected to the signal detection port through a fourth diode and interface circuitry, and a given signal of the second device temperature control unit is connected to the signal detection port through a fifth diode and interface circuitry.
4. The system of claim 3, wherein the plurality of signal output ports comprises a first output port, a second output port, a third output port, a fourth output port, and a fifth output port, the first output port is connected to the positive input of the first diode through a first resistor and a first switching device, the second output port is connected to the positive input of the second diode through a second resistor and a second switching device, the third output port is connected to the positive input of the third diode through a third resistor and a third switching device, the fourth output port is connected to the positive input of the fourth diode through a fourth resistor and a fourth switching device, and the fifth output port is connected to the positive input of the fifth diode through a fifth resistor and a fifth switching device.
5. The system of claim 4, wherein the collector of the first switching device is connected to the positive input of the first diode, the base of the first switching device is connected to the first resistor, and the emitter of the first switching device is grounded; the collector of the second switching device is connected with the positive input end of the second diode, the base of the second switching device is connected with the second resistor, and the emitter of the second switching device is grounded; the collector of the third switching device is connected with the positive input end of the third diode, the base of the third switching device is connected with the third resistor, and the emitter of the third switching device is grounded; a collector of the fourth switching device is connected with a positive input end of a fourth diode, a base of the fourth switching device is connected with a fourth resistor, and an emitter of the fourth switching device is grounded; the collector of the fifth switching device is connected with the positive input end of the fifth diode, the base of the fifth switching device is connected with the fifth resistor, and the emitter of the fifth switching device is grounded.
6. The system according to claim 3, wherein the interface circuit is configured to divide and filter a voltage or current signal given by the plurality of signal input modules, and the interface circuit includes a first voltage dividing resistor, a second voltage dividing resistor, a filter capacitor, and a sampling resistor, the filter capacitor is connected in parallel across the second voltage dividing resistor, the first voltage dividing resistor is connected to the common negative input terminal of the first diode, the second diode, the third diode, the fourth diode, and the fifth diode, one end of the second voltage dividing resistor is connected to the first voltage dividing resistor, the other end of the second voltage dividing resistor is connected to ground, one end of the sampling resistor is connected to the signal detection port, and the other end of the sampling resistor is connected to the filter capacitor.
7. The system of claim 1, wherein the signal detection port is adapted to perform a sampling operation on a voltage signal given by the welding voltage adjustment unit when a low level signal is output from the first output port and high level signals are output from the second, third, fourth, and fifth output ports;
when the second output port outputs low level signals and the first output port, the third output port, the fourth output port and the fifth output port output high level signals, the signal detection port is suitable for sampling operation processing of voltage signals given by the welding wire feeding speed adjusting unit;
when the third output port outputs a low-level signal and the first, second, fourth and fifth output ports output a high-level signal, the signal detection port is suitable for performing sampling operation processing on a voltage signal given by the ambient temperature control unit;
when the fourth output port outputs a low-level signal and the first output port, the second output port, the third output port and the fifth output port output a high-level signal, the signal detection port is suitable for performing sampling operation processing on a voltage signal given by the first device temperature control unit;
when the fifth output port outputs a low-level signal and the first, second, third and fourth output ports output a high-level signal, the signal detection port is adapted to perform sampling operation processing on a voltage signal given by the second device temperature control unit.
8. A method for detecting multiple input signals, the method comprising:
receiving a plurality of signals to be detected which are simultaneously input by a plurality of signal input modules;
and controlling a plurality of signal output ports correspondingly connected with the plurality of signal input modules to output pulse width driving signals with different time sequences, and controlling the input signals of the plurality of signal input modules to be switched on or switched off according to the pulse width driving signals.
9. The method of claim 8, wherein the step of controlling the plurality of signal input module input signals to turn on or off according to the pulse width driving signal comprises:
when the pulse width driving signal output by any one of the signal output ports is at a low level and the pulse width driving signals output by the other signal output ports are at a high level, the signal input module connected with the signal output end of which the pulse width driving signal output is at the low level is in signal conduction;
and carrying out sampling operation processing on the signal input module which is conducted by the signal to obtain a signal detection result.
10. An inverter welder, comprising:
the multiple-input signal detecting system according to any one of claims 1 to 7, configured to perform time-division sampling operation on multiple voltage or current signals to be detected connected to the inverter welding machine by controlling a timing of outputting the pulse width driving signal through the signal output port, so as to obtain a signal detection result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210868032.8A CN115319240A (en) | 2022-07-22 | 2022-07-22 | Multi-input signal detection system and method and inverter welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210868032.8A CN115319240A (en) | 2022-07-22 | 2022-07-22 | Multi-input signal detection system and method and inverter welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115319240A true CN115319240A (en) | 2022-11-11 |
Family
ID=83920193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210868032.8A Pending CN115319240A (en) | 2022-07-22 | 2022-07-22 | Multi-input signal detection system and method and inverter welding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115319240A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116761300A (en) * | 2023-08-17 | 2023-09-15 | 深圳莱福德科技股份有限公司 | Abnormality detection method based on multi-signal analysis and application of abnormality detection method in lighting system |
| CN117368698A (en) * | 2023-11-01 | 2024-01-09 | 上海合芯数字科技有限公司 | Chip circuit and testing method thereof |
-
2022
- 2022-07-22 CN CN202210868032.8A patent/CN115319240A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116761300A (en) * | 2023-08-17 | 2023-09-15 | 深圳莱福德科技股份有限公司 | Abnormality detection method based on multi-signal analysis and application of abnormality detection method in lighting system |
| CN116761300B (en) * | 2023-08-17 | 2023-11-03 | 深圳莱福德科技股份有限公司 | Abnormality detection method based on multi-signal analysis and application of abnormality detection method in lighting system |
| CN117368698A (en) * | 2023-11-01 | 2024-01-09 | 上海合芯数字科技有限公司 | Chip circuit and testing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115319240A (en) | Multi-input signal detection system and method and inverter welding machine | |
| US4511827A (en) | Apparatus for driving a polyphase brushless motor with a suppressed torque ripple | |
| CN102708805B (en) | Multichannel LED backlight source drive circuit and liquid crystal display device utilizing same | |
| CN109905060A (en) | Semiconductor equipment, motor driven systems and motor control program | |
| CN105027406B (en) | Impulse density D/A converter with slope-compensation function | |
| CN105846746A (en) | Motor drive device | |
| JPS57148592A (en) | Stepping motor controller | |
| JP2003088138A (en) | Gate control device and method of 3-level inverter | |
| CN103696167B (en) | Control device for industrial sewing machines | |
| DE10238068A1 (en) | Umrichteinrichtung | |
| CN113878183A (en) | Multi-mode self-adaptive pulse power supply for electric spark machining of multilayer materials | |
| US3767998A (en) | Constant current power supply | |
| US8436566B2 (en) | Multi-speed control apparatus for fan motor | |
| CN107994817A (en) | Counter electromotive force of motor sampling system and its method | |
| CN111431395A (en) | Switch ringing suppression circuit based on gate driver and control method thereof | |
| CN208304083U (en) | A kind of intelligence control system of electric discharge machine | |
| CN107979266B (en) | Single-inductance double-output switch converters voltage-type-capacitance current ripple mixing control method and device | |
| CN202818206U (en) | Brush direct current motor control driver | |
| CN204576921U (en) | A kind of Digital Electric electronic experimental device | |
| CN207663277U (en) | Propeller control device and propeller control system | |
| CN109680400B (en) | Intelligent needle selector driving circuit | |
| CN204408227U (en) | Multi-motor control system | |
| GB1493302A (en) | Arrangement for supplying a load from a dc voltage source | |
| EP1482154A3 (en) | Circuit and method for controlling at least one electrical component of a motor vehicle | |
| SU1436267A1 (en) | Device for controlling stepping motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |