CN116408971A - Detection circuit, detection device and printing system - Google Patents

Detection circuit, detection device and printing system Download PDF

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Publication number
CN116408971A
CN116408971A CN202111678174.XA CN202111678174A CN116408971A CN 116408971 A CN116408971 A CN 116408971A CN 202111678174 A CN202111678174 A CN 202111678174A CN 116408971 A CN116408971 A CN 116408971A
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China
Prior art keywords
resistor
detection
probe
circuit
electrically connected
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Pending
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CN202111678174.XA
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Chinese (zh)
Inventor
马宁
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Shenzhen Anycubic Technology Co Ltd
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Shenzhen Anycubic Technology Co Ltd
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Priority to CN202111678174.XA priority Critical patent/CN116408971A/en
Publication of CN116408971A publication Critical patent/CN116408971A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/307—Handling of material to be used in additive manufacturing
    • B29C64/321—Feeding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
    • B33Y40/10—Pre-treatment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

The invention discloses a detection circuit, a detection device and a printing system, which mainly realize timely resin replenishment by generating a feedback signal when printing resin is insufficient. The main technical scheme of the invention is as follows: the detection circuit comprises a first resistor of a detection circuit, a second resistor, a third resistor and a third resistor, wherein the first resistor of the detection circuit is connected with a high level, the first resistor is connected with the second resistor, the second resistor is connected with the third resistor, and the third resistor is grounded; the first end of the second resistor is electrically connected with the first probe, the second end of the second resistor is electrically connected with the second probe, the first probe and the second probe are respectively used for being connected with printing resin, and the second resistor and the reference voltage generating circuit are respectively connected with the comparator; when the printing resin is in a first state, the first probe and the second probe are disconnected, the detection voltage of the second end of the second resistor is smaller than the reference voltage, and the comparator outputs a first feedback control signal to control the automatic feeding module of the three-dimensional printer to close an automatic feeding function. The invention is mainly used for detecting the printing resin.

Description

Detection circuit, detection device and printing system
Technical Field
The invention relates to the technical field of 3D printing, in particular to a detection circuit, a detection device and a printing system.
Background
A 3D printer is a machine that accumulates manufacturing techniques, i.e., rapid prototyping techniques. In a common photocuring 3D printer, a trough is placed on a light source of the printer after resin is contained in the trough, and the resin in the trough is solidified layer by layer to realize three-dimensional printing. In the printing process, the resin in the trough is continuously reduced, the liquid level detection part and the resin bottle can be adopted to be matched for automatic replenishment of the resin, the liquid level detection part is used for detecting the liquid level of the resin in the trough, when the liquid level is lower than a threshold value, the resin bottle containing the resin is inflated, the resin in the bottle is extruded into the trough to realize automatic replenishment, and enough resin in the trough is enabled to be continuously printed.
Wherein, the resin volume in the resin bottle is limited, and when the resin in the resin bottle is not enough and not in time supply, will cause to print the failure because the outage, and the discharging pipe of resin bottle can be because the effect of aerifing constantly blows outwards, leads to the inslot resin unstable, influences the printing effect.
Disclosure of Invention
In view of the above, in order to solve the above-mentioned technical problems, an embodiment of the present invention provides a detection circuit, a detection device and a printing system, which mainly generate a feedback control signal to close an automatic feeding function of a three-dimensional printer when the printing resin is insufficient, so as to timely perform resin replenishment.
In one aspect, an embodiment of the present invention provides a detection circuit for detecting three-dimensional printing resin, including:
the device comprises a detection circuit, a reference voltage generation circuit and a comparator;
the detection circuit comprises a first probe, a second probe, a first resistor, a second resistor and a third resistor;
the first end of the first resistor is connected with a high level, the second end of the first resistor is electrically connected with the first end of the second resistor, the second end of the second resistor is electrically connected with the first end of the third resistor, and the second end of the third resistor is grounded;
the first end of the second resistor is also electrically connected with the first probe, the second end of the second resistor is also electrically connected with the second probe, and the first probe and the second probe are respectively used for connecting printing resin;
the second end of the second resistor and the output end of the reference voltage generating circuit are respectively and electrically connected with the input end of the comparator;
the reference voltage generating circuit is used for outputting a reference voltage, when the printing resin is in a first state, the first probe and the second probe are disconnected, the detection voltage of the second end of the second resistor is smaller than the reference voltage, and the comparator is used for outputting a first feedback control signal when the detection voltage is smaller than the reference voltage so as to control the automatic feeding module of the three-dimensional printer to close an automatic feeding function.
Further comprises: the indication circuit comprises a switch circuit and an alarm circuit;
the output end of the comparator is electrically connected with the input end of the switching circuit, and the output end of the switching circuit is electrically connected with the input end of the alarm circuit;
the switch circuit is used for outputting a trigger signal to the alarm circuit when receiving the first feedback control signal, and the alarm circuit is used for outputting alarm information when receiving the trigger signal.
The switching circuit includes a first transistor;
the alarm circuit comprises a light-emitting transistor;
the output end of the comparator is electrically connected with the first end of the first transistor, the second end of the first transistor is connected with the high level and the first end of the light emitting transistor, the third end of the first transistor is grounded, and the second end of the light emitting transistor is connected with the high level;
the alarm information includes an optical signal generated by the light emitting transistor.
The reference voltage generating circuit comprises a voltage dividing resistor and a variable resistor;
the first end of the voltage dividing resistor is connected with a high level, the second end of the voltage dividing resistor is connected with the first end of the variable resistor, and the second end of the variable resistor is grounded;
the second end of the divider resistor is electrically connected with the input end of the comparator, and the variable resistor is used for adjusting the reference voltage by changing the resistance value.
Further comprises: the device comprises a main control module, a man-machine interaction module and an automatic feeding module;
the input end of the main control module is electrically connected with the output end of the switch circuit, and the output end of the main control module is respectively electrically connected with the man-machine interaction module and the automatic feeding module;
the main control module is used for controlling the man-machine interaction module 6 to output feedback information and controlling the automatic feeding module to close an automatic feeding function when receiving a trigger signal output by the switch circuit;
the feedback information includes alarm information and image information.
The detection circuit further includes: when the printing resin is changed from the first state to the second state, the first probe and the second probe are electrically conducted, the detection voltage of the second end of the second resistor is larger than the reference voltage, and the comparator is used for outputting a second feedback control signal when the detection voltage is larger than the reference voltage so as to switch the automatic feeding function of the automatic feeding module from the off state to the on state.
On the other hand, the embodiment of the invention also provides a detection device, which comprises the detection circuit as described in any one of the above, a container, an end cover, a first detection rod and a second detection rod;
the container and the end cover enclose a containing cavity, the containing cavity is used for containing printing resin, the first end of the first detection rod and the first end of the second detection rod are respectively connected to the end cover in a penetrating way, the first detection rod and the second detection rod extend in the containing cavity along the lifting direction of the liquid level of the printing resin, the second end of the first detection rod and the second end of the second detection rod are opposite to the bottom wall of the container, and the second end of the first detection rod and the second end of the second detection rod are used for detecting the printing resin;
wherein, the end cover is connected with the container detachably, and first measuring bar and second measuring bar are the conductor.
The first end of the first detection rod and the first end of the second detection rod are respectively provided with an interface end at the end cover, and the two interface ends are respectively used for being electrically connected with the first probe and the second probe through data wires;
the first probe of the detection circuit detects the printing resin through the second end of the first detection rod, the second probe of the detection circuit detects the printing resin through the second end of the second detection rod, and when the first detection rod and the second detection rod both detect the printing resin, the first probe is electrically connected with the second probe.
When the first detection rod and/or the second detection rod does not detect the printing resin, the first probe is not electrically connected with the second probe, and the comparator outputs a first feedback control signal to control the automatic feeding module of the three-dimensional printer to close an automatic feeding function.
In still another aspect, an embodiment of the present invention further provides a printing system, including a detection apparatus as set forth in any one of the above and a three-dimensional printer.
The detection circuit, the detection device and the printing system provided by the embodiment of the invention mainly generate a feedback signal when the printing resin in the resin bottle is insufficient, so that timely early warning is realized to supplement the resin. In the prior art, when the resin in the resin bottle is less and not timely replenished, the automatic feeding function of the three-dimensional printer still works, the resin in the resin bottle is sent to the material groove of the printer, and the discharging pipe of the resin bottle continuously blows outwards because the resin bottle is free of resin or the resin is extremely less, so that a large amount of air rather than resin is sent to the material groove, the resin in the material groove is unstable, and the printing effect is influenced. Compared with the prior art, in this application file, the detection circuit is connected and is printed the resin, and the detection circuit is in when printing the surplus of resin and being in first state, and the comparator compares the detection voltage of receiving with reference voltage, and output control signal according to the comparison result realizes closing the automatic feed function of three-dimensional printer to and the timely replenishment of printing the resin.
Drawings
FIG. 1 is a schematic circuit diagram of a detection circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a detection device according to an embodiment of the present invention when a printing resin is in a first state;
FIG. 3 is a schematic structural diagram of a detecting device according to an embodiment of the present invention when a printing resin is in a second state;
fig. 4 is a schematic structural diagram of a detection device and an automatic feeding module according to an embodiment of the present invention.
Detailed Description
In order to further describe the technical means and effects adopted for achieving the preset aim of the present invention, the following detailed description will refer to the specific implementation, structure, characteristics and effects of the detection circuit according to the present invention with reference to the accompanying drawings and preferred embodiments.
As shown in fig. 1, an embodiment of the present invention provides a detection circuit for detecting three-dimensional printing resin, including:
a detection circuit 1, a reference voltage generation circuit 2, and a comparator 3;
the detection circuit 1 comprises a first probe 01, a second probe 02, a first resistor R1, a second resistor R2 and a third resistor R3;
the first end of the first resistor R1 is connected with a high level, the second end of the first resistor R1 is electrically connected with the first end of the second resistor R2, the second end of the second resistor R2 is electrically connected with the first end of the third resistor R3, and the second end of the third resistor R3 is grounded;
the first end of the second resistor R2 is also electrically connected with the first probe 01, the second end of the second resistor R2 is also electrically connected with the second probe 02, and the first probe 01 and the second probe 02 are respectively used for connecting printing resin;
the second end of the second resistor R2 and the output end of the reference voltage generating circuit 2 are respectively and electrically connected with the input end of the comparator 3;
the reference voltage generating circuit 2 is configured to output a reference voltage, when the printing resin is in the first state, the first probe 01 and the second probe 02 are turned off, the detection voltage of the second end of the second resistor R2 is smaller than the reference voltage, and the comparator 3 is configured to output a first feedback control signal to control the automatic feeding module 7 of the three-dimensional printer to turn off the automatic feeding function when the detection voltage is smaller than the reference voltage.
The detecting circuit 1 is used for feeding back a detecting voltage according to the residual quantity of the printing resin, the detecting circuit 1 can comprise a detecting piece such as a probe which can be inserted into the printing resin, and the detecting piece can send different feedback signals when contacting the printing resin or not contacting the printing resin, or the detecting circuit 1 can further comprise a liquid level detector for feeding back different signals according to the liquid level of the printing resin, or the detecting circuit 1 can further comprise a mechanical detecting device such as a float, and when the height of the float is lowered to a certain height along with the upper surface of the printing resin, a switch is triggered, and then the feedback signals are sent. The detection circuit 1 may have various forms, and it is sufficient that detection voltages of different magnitudes can be generated when the remaining amount of the printing resin, that is, the liquid level of the printing resin, is above or below the threshold value, respectively. The reference voltage generation circuit 2 generates a reference voltage for determining the magnitude of the detection voltage, the reference voltage being a fixed value. The comparator 3 may be a comparing amplifier for comparing the magnitudes of the detection voltage and the reference voltage and generating different amplified signals.
In one embodiment, the three-dimensional printer has an automatic feeding function, and the automatic feeding function is realized through an automatic feeding module 7, and the automatic feeding module 7 is used for switching on and switching off the automatic feeding function of the three-dimensional printer according to the output signal of the comparator 3. Specifically, the detection circuit 1 includes a first probe 01 and a second probe 02, where the first probe 01 and the second probe 02 are both metal probes, when the printing resin is in a first state, that is, when the residual amount of the printing resin is smaller than a threshold value, the first probe 01 and the second probe 02 are disconnected, the detection voltage at the second end of the second resistor R2 is smaller than a reference voltage, the comparator 3 outputs a first feedback control signal, and the automatic feeding module 7 turns off the automatic feeding function of the three-dimensional printer. When the printing resin is changed from the first state to the second state, that is, when the printing resin is greater than the margin threshold, the first probe 01 and the second probe 02 are turned on, the detection voltage of the second end of the second resistor R2 is greater than the reference voltage, and the comparator 3 outputs a second feedback control signal to switch the automatic feeding function of the automatic feeding module 7 from the off state to the on state.
Further, when the first probe 01 and the second probe 02 are conducted through the printing resin, which is equivalent to that a resistor formed by the printing resin is connected between the first probe 01 and the second probe 02, and the conductive capacities of different printing resins are different, when specific values of the resistance values of the respective resistors in the detection circuit 1 are determined, the conductive capacities of different printing resins need to be adjusted to the resistance values in the detection circuit 1, so that the detection circuit 1 can output detection voltages larger than the reference voltage and detection voltages smaller than the reference voltage when detecting various different printing resins. In this embodiment, the first resistor R1, the second resistor R2 and the third resistor R3 are connected in series, the first probe 01 and the second probe 02 are connected to two ends of the second resistor R2, so that convenience in determining the resistance value of each resistor can be achieved, specifically, when the first probe 01 and the second probe 02 are conducted, the first probe 01 and the second probe 02 are equivalent to connecting a resin resistor in parallel to the second resistor R2, and then the voltage division at two ends of the second resistor R2 is changed, so that the voltage output by the second end of the second resistor R2 is changed, that is, the factor of changing the voltage output by the second end of the second resistor R2 is mainly concentrated on the selection of the resistance value of the second resistor R2, and the detection circuit 1 can realize the detection function for a plurality of different printing resins only by debugging the resistance value of the second resistor R2.
The reference voltage can be set according to the specific form of the detection circuit 1, and is intended to provide a basis for judging the detection voltage. When the detection circuit is used for detection of a wide range of various printing materials, the reference voltage generation circuit 2 can be set to be adjustable in reference voltage magnitude, and detailed embodiments will be described later.
The detection circuit, the detection device and the printing system provided by the embodiment of the invention mainly generate a feedback signal when the printing resin in the resin bottle is insufficient, so that timely early warning is realized to supplement the resin. In the prior art, when the resin in the resin bottle is less and not timely replenished, the automatic feeding function of the three-dimensional printer still works, the resin in the resin bottle is sent to the material groove of the printer, and the discharging pipe of the resin bottle continuously blows outwards because the resin bottle is free of resin or the resin is extremely less, so that a large amount of air rather than resin is sent to the material groove, the resin in the material groove is unstable, and the printing effect is influenced. Compared with the prior art, in this application file, the detection circuit is connected and is printed the resin, and the detection circuit is in when printing the surplus of resin and being in first state, and the comparator compares the detection voltage of receiving with reference voltage, and output control signal according to the comparison result realizes closing the automatic feed function of three-dimensional printer to and the timely replenishment of printing the resin.
Further, the detection circuit further comprises an indication circuit 4, and the indication circuit 4 comprises a switch circuit and an alarm circuit. The output end of the comparator 3 is electrically connected with the input end of the switching circuit, and the output end of the switching circuit is electrically connected with the input end of the alarm circuit. The switch circuit is used for outputting a trigger signal to the alarm circuit when receiving the first feedback control signal, and the alarm circuit is used for outputting alarm information when receiving the trigger signal.
The method for monitoring the signal at the output end of the comparator 3 can be that the signal is received by a control chip or a computer for display, or the signal is prompted by means of an indicator lamp, an audible and visual alarm and the like. The embodiment provides a simple luminescence prompting circuit, the switch circuit includes a first transistor Q1, the alarm circuit includes a luminescence transistor D1, an output end of the comparator 3 is electrically connected with a first end of the first transistor Q1, a second end of the first transistor Q1 is connected with a high level and the first end of the luminescence transistor D1, a third end of the first transistor Q1 is grounded, and a second end of the luminescence transistor D1 is connected with a high level. The alarm information includes an optical signal generated by the light emitting transistor D1.
In one embodiment, the light emitting transistor D1 is a light emitting diode, the first transistor Q1 is a PNP type transistor, an emitter E of the transistor is connected to a high level through a pull-up resistor, a collector C is grounded, a base B, i.e., a control end, is connected to an output end of the comparator 3, the emitter E is further connected to a cathode of the light emitting diode, and an anode of the emitter E is connected to the high level through the pull-up resistor. The specific working principle is as follows: when the first probe 01 and the second probe 02 are switched on, the comparator 3 outputs a high level, the first transistor Q1 is not switched on, the light emitting diode does not emit light, and when the first probe 01 and the second probe 02 are switched off, the comparator 3 outputs a low level, and the first transistor Q1 is switched on, so that the light emitting diode is switched on and emits light.
In one embodiment, the reference voltage generating circuit 2 includes a voltage dividing resistor R4 and a variable resistor R5. The first end of the voltage dividing resistor R4 is connected with a high level, the second end of the voltage dividing resistor R4 is connected with the first end of the variable resistor R5, and the second end of the variable resistor R5 is grounded. The second end of the voltage dividing resistor R4 is electrically connected to the input end of the comparator 3, and the variable resistor R5 is used for adjusting the reference voltage by changing the resistance value.
The variable resistor R5 can be specifically a sliding rheostat, the second end of the voltage dividing resistor R4 is connected with the first end of the sliding rheostat, the sliding control end of the sliding rheostat is connected with the first end of the sliding rheostat, the second end of the sliding rheostat is grounded, when the sliding control end of the sliding rheostat slides, the resistor between the first end and the second end of the sliding rheostat can be changed, the voltage division of the sliding rheostat can be changed through the change of the resistance value of the sliding rheostat, and then the reference voltage can be adjusted. Because the on-resistance values of different printing materials are different, when the probe is turned on and turned off, the voltage output by the detection circuit 1 is smaller than the reference voltage, and the reference voltage needs to be adjusted at the moment, so that the adjustment of the reference voltage is mainly used for ensuring that the turn-on and turn-off of the probe can trigger the jump of the output signal of the comparator 3. If the detection circuit detects only the same printing material, and if the detection circuit detects only the same resin, the variable resistor R5 may be a resistor with a fixed resistance value that is adjusted. The variable resistor R5 may also be other forms of variable resistor, such as a temperature-sensitive resistor or a light-sensitive resistor.
Further, the detection circuit also comprises a main control module 5, a man-machine interaction module 6 and an automatic feeding module 7. The input end of the main control module 5 is connected with the output end of the switch circuit, and the output end of the main control module 5 is respectively connected with the man-machine interaction module 6 and the automatic feeding module 7. The main control module 5 is used for controlling the man-machine interaction module 6 to output feedback information and controlling the automatic feeding module 7 to close an automatic feeding function when receiving a trigger signal output by the switch circuit. The feedback information includes alarm information and image information.
In one embodiment, the main control module 5 is an MCU chip, which may be a chip dedicated to a detection circuit, or may be a motherboard inside a three-dimensional printer, and the man-machine interaction module 6 may be a touch display screen or other audible and visual alarm device of the three-dimensional printer. Such as the human-computer interaction module 6 comprises a buzzer and a touch screen. The MCU chip is connected with the emitter E of the first transistor Q1, when the comparator 3 outputs a low level, the first transistor Q1 is turned on, so that the emitter E level is turned over and is changed from a high level to a low level, the MCU chip judges that the resin allowance in the material bottle is insufficient after receiving a level turning signal of the first transistor Q1, and the human-computer interaction module 6 displays image information to prompt a user and starts a buzzer to carry out audible and visual alarm.
In another aspect, as shown in fig. 2-3, embodiments of the present invention also provide a testing device comprising a testing circuit as described above, and a container 10, an end cap 20, a first testing lever 30, and a second testing lever 40. The container 10 encloses with the end cover 20 and becomes and hold the chamber, holds the intracavity and is used for holding printing resin, and the first end of first detection pole 30 and the first end of second detection pole 40 cross-under respectively in end cover 20, and first detection pole 30 and second detection pole 40 are holding the intracavity and are extending along printing resin liquid level lift direction, and the second end of first detection pole 30 and the second end of second detection pole 40 are relative with the diapire of container 10, and the second end of first detection pole 30 and the second end of second detection pole 40 are used for detecting printing resin. Wherein, end cap 20 is detachably connected with container 10, and first detection rod 30 and second detection rod 40 are both conductors.
The first detecting rod 30 may be made of brass nickel plating material, and the second detecting rod 40 may be made of aluminum tube, so that conductivity is ensured. The container 10 is the material bottle, during the use, end cover 20 is connected with material bottle open top, print resin subsides in container 10 below, first detection pole 30 and second detection pole 40 cross-under in end cover 20, and extend in vertical direction, first detection pole 30 and second detection pole 40 bottom be close the bottle end, certain gap with the bottle end interval, when print resin surplus is sufficient, in the printing resin is inserted to first detection pole 30 and second detection pole 40, first detection pole 30 and second detection pole 40 switch on, when print resin surplus is insufficient, first detection pole 30 and second detection pole 40 break away from the printing resin, first detection pole 30 and second detection pole 40 break away from as shown in fig. 3.
The end cover 20 is detachably connected with the container 10, specifically, through threaded connection, so that the end cover 20 with the first detection rod 30 and the second detection rod 40 can be suitable for various material bottles, and when the printer has a requirement on the appearance of the material bottle, the detection of printing resin can be realized only by replacing the end cover 20.
The first end of the first detection rod and the first end of the second detection rod are respectively provided with interface ends at the end cover, and the two interface ends are respectively used for being electrically connected with the first probe and the second probe through data wires. The first probe 01 of the detection circuit 1 detects the printing resin through the second end of the first detection lever 30, and the second probe 02 of the detection circuit 1 detects the printing resin through the second end of the second detection lever 40. When the first and second detection bars 30 and 40 each detect the printing resin, the first probe 01 is electrically connected to the second probe 02.
The first probe 01 and the second probe 02 are both metal probes, the first detection rod 30 and the second detection rod 40 are both metal detection rods, the first end of the first detection rod 30 and the first end of the second detection rod 40 are respectively provided with an interface end at the end cover 20, and the two interface ends are respectively used for being electrically connected with the first probe 01 and the second probe 02 through data wires. When the first detecting rod 30, the second detecting rod 40 and the printing resin are not electrically conducted, the amplifier 3 outputs a first feedback control signal to control the automatic feeding module 7 of the three-dimensional printer to close the automatic feeding function.
The detection circuit is integrated on the main control board of the three-dimensional printer, and when the three-dimensional printer is used, the first detection rod 30 and the second detection rod 40 are respectively connected to the printer through the data line, so that the first detection rod 30 and the second detection rod 40 are respectively electrically connected with the first probe 01 and the second probe 02, the detection of the printing resin state is carried out through the connection relation between the first detection rod 30 and the second detection rod 40 and the printing resin, the main control board of the three-dimensional printer receives detection signals, and then the automatic feeding function of the automatic feeding module 7 is controlled to be started and closed.
In the detection process, when the printing resin allowance is smaller than a threshold value, the first detection rod 30 and the second detection rod 40 are disconnected, so that the first probe 01 and the second probe 02 are disconnected, a series circuit is formed by the first resistor R1, the second resistor R2 and the third resistor R3, and the voltage division of the second resistor R2 enables the detection voltage of the second end of the second resistor R2 to be smaller than a reference voltage so as to control the automatic feeding module to close the automatic feeding function of the automatic feeding module 7; when the remaining amount of the printing resin is greater than the threshold value, the first detecting lever 30 and the second detecting lever 40 are turned on by the printing resin, so that the first probe 01 and the second probe 02 are turned on, which is equivalent to forming a resistor composed of the printing resin between the first probe 01 and the second probe 02, the resistor composed of the printing resin is connected in parallel with the second resistor R2, so that the voltage division of the second resistor R2 becomes smaller, the voltage output by the second end of the second resistor R2 is increased, the detection voltage of the second end of the second resistor R2 is greater than the reference voltage, and the comparator 3 outputs a second feedback control signal, thereby starting the automatic feeding function of the automatic feeding module 7.
It will be appreciated that the disconnection of the first 30 and second 40 test bars includes three situations: first, neither the first detection bar 30 nor the second detection bar 40 detects the printing resin; secondly, the first detecting lever 30 detects the printing resin, and the second detecting lever 40 does not detect the printing resin; third, the first detecting lever 30 does not detect the printing resin, and the second detecting lever 40 detects the printing resin. The first probe and the second probe can be disconnected under all three conditions so as to control an automatic feeding module of the three-dimensional printer to close an automatic feeding function. The automatic feeding function is turned on only when the first and second detecting bars 30 and 40 all detect the printing resin.
Further, the automatic feeding module 7 performs opening and closing of a feeding function through the automatic feeding device, the first detecting rod 30 is used as a probe for detecting printing resin and also used as an outlet for printing resin, and the first detecting rod 30 is of a hollow structure.
As shown in fig. 4, the automatic feeding device comprises an air port 201 arranged on the end cover 20, an air duct 202 connected with the air port 201, and a vacuum pump 203, wherein the vacuum pump 203 is respectively connected with the automatic feeding module 7 and the air duct 202; the automatic feeding module 7 is used for starting the vacuum pump 203 when the first probe 01 and the second probe 02 are conducted, the vacuum pump 203 is inflated into the accommodating cavity through the air duct 202, so that printing resin is discharged to the printer trough 60 through the central through hole of the first detection rod 30, and the automatic feeding module 7 is used for closing the vacuum pump 203 when the first probe 01 and the second probe 02 are disconnected, and stopping driving and extruding the printing resin.
In still another aspect, an embodiment of the present invention further provides a printing system, including a detection device as set forth in any one of the above and a printer, where the printer includes the above-mentioned printer tank 60, the first detection rod 30 is connected with a discharge hose, the discharge hose corresponds to the printer tank 60, and the printing resin is conveyed into the printer tank 60 through the discharge hose after being pressed by the central through hole of the first detection rod 30.
The embodiment of the invention provides a detection circuit for detecting three-dimensional printing resin, which comprises the following components:
a detection circuit 1, a reference voltage generation circuit 2, and a comparator 3;
the detection circuit 1 comprises a first probe 01, a second probe 02, a first resistor R1, a second resistor R2 and a third resistor R3;
the first end of the first resistor R1 is connected with a high level, the second end of the first resistor R1 is electrically connected with the first end of the second resistor R2, the second end of the second resistor R2 is electrically connected with the first end of the third resistor R3, and the second end of the third resistor R3 is grounded;
the first end of the second resistor R2 is also electrically connected with the first probe 01, the second end of the second resistor R2 is also electrically connected with the second probe 02, and the first probe 01 and the second probe 02 are respectively used for connecting printing resin;
the second end of the second resistor R2 and the output end of the reference voltage generating circuit 2 are respectively and electrically connected with the input end of the comparator 3;
the reference voltage generating circuit 2 is used for outputting a reference voltage, when the printing resin is in a first state, the first probe 01 and the second probe 02 are disconnected, the detection voltage of the second end of the second resistor R2 is smaller than the reference voltage, and the comparator 3 is used for outputting a first feedback control signal to control the automatic feeding module of the three-dimensional printer to close an automatic feeding function when the detection voltage is smaller than the reference voltage.
Wherein, still include: an indication circuit 4, the indication circuit 4 including a switch circuit and an alarm circuit;
the output end of the comparator 3 is electrically connected with the input end of the switching circuit, and the output end of the switching circuit is electrically connected with the input end of the alarm circuit;
the switch circuit is used for outputting a trigger signal to the alarm circuit when receiving the first feedback control signal, and the alarm circuit is used for outputting alarm information when receiving the trigger signal.
Wherein the switching circuit comprises a first transistor Q1;
the alarm circuit comprises a light-emitting transistor D1;
the output end of the comparator 3 is electrically connected with the first end of the first transistor Q1, the second end of the first transistor Q1 is connected with the high level and the first end of the light emitting transistor D1, the third end of the first transistor Q1 is grounded, and the second end of the light emitting transistor D1 is connected with the high level;
the alarm information includes an optical signal generated by the light emitting transistor D1.
Wherein the reference voltage generating circuit 2 includes a voltage dividing resistor R4 and a variable resistor R5;
the first end of the voltage dividing resistor R4 is connected with a high level, the second end of the voltage dividing resistor R4 is connected with the first end of the variable resistor R5, and the second end of the variable resistor R5 is grounded;
the second end of the voltage dividing resistor R4 is electrically connected to the input end of the comparator 3, and the variable resistor R5 is used for adjusting the reference voltage by changing the resistance value.
Wherein, still include: the device comprises a main control module 5, a man-machine interaction module 6 and an automatic feeding module 7;
the input end of the main control module 5 is electrically connected with the output end of the switch circuit, and the output end of the main control module 5 is electrically connected with the man-machine interaction module 6 and the automatic feeding module 7 respectively;
the main control module 5 is used for controlling the man-machine interaction module 6 to output feedback information and controlling the automatic feeding module 7 to close an automatic feeding function when receiving a trigger signal output by the switch circuit;
the feedback information comprises audible and visual alarm information and image information.
Wherein the detection circuit further comprises: when the printing resin is changed from the first state to the second state, the first probe 01 and the second probe 02 are electrically conducted, the detection voltage of the second end of the second resistor R2 is larger than the reference voltage, and the comparator 3 is used for outputting a second feedback control signal to switch the automatic feeding function of the automatic feeding module from the off state to the on state when the detection voltage is larger than the reference voltage.
In another aspect, an embodiment of the present invention further provides a detection device, including a detection circuit as described in any one of the above, and a container 10, an end cap 20, a first detection bar 30, and a second detection bar 40;
the container 10 and the end cover 20 are enclosed to form a containing cavity, the containing cavity is used for containing printing resin, the first end of the first detection rod 30 and the first end of the second detection rod 40 are respectively connected to the end cover 20 in a penetrating way, the first detection rod 30 and the second detection rod 40 extend in the containing cavity along the lifting direction of the liquid level of the printing resin, the second end of the first detection rod 30 and the second end of the second detection rod 40 are opposite to the bottom wall of the container 10, and the second end of the first detection rod 30 and the second end of the second detection rod 40 are used for detecting the printing resin;
wherein, end cap 20 is detachably connected with container 10, and first detection rod 30 and second detection rod 40 are both conductors.
Wherein, the first end of the first detecting rod 30 and the first end of the second detecting rod 40 are respectively provided with an interface end at the end cover 20, and the two interface ends are respectively used for being electrically connected with the first probe 01 and the second probe 02 through data wires;
the first probe 01 of the detection circuit 1 detects the printing resin through the second end of the first detection bar 30, the second probe 02 of the detection circuit 1 detects the printing resin through the second end of the second detection bar 40, and when the first detection bar 30 and the second detection bar 40 both detect the printing resin, the first probe 01 is electrically connected to the second probe 02.
Wherein, when the first detecting rod 30 and/or the second detecting rod 40 does not detect the printing resin, the first probe 01 and the second probe 02 are not electrically conducted, and the comparator 3 outputs a first feedback control signal to control the automatic feeding module 7 of the three-dimensional printer to close the automatic feeding function.
In still another aspect, an embodiment of the present invention further provides a printing system, including a detection device as set forth in any one of the above, and a three-dimensional printer
The foregoing is merely illustrative embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present invention, and the invention should be covered. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims (10)

1. A detection circuit for detecting three-dimensional printing resin, comprising:
the device comprises a detection circuit, a reference voltage generation circuit and a comparator;
the detection circuit comprises a first probe, a second probe, a first resistor, a second resistor and a third resistor;
the first end of the first resistor is connected with a high level, the second end of the first resistor is electrically connected with the first end of the second resistor, the second end of the second resistor is electrically connected with the first end of the third resistor, and the second end of the third resistor is grounded;
the first end of the second resistor is also electrically connected with the first probe, the second end of the second resistor is also electrically connected with the second probe, and the first probe and the second probe are respectively used for connecting the printing resin;
the second end of the second resistor and the output end of the reference voltage generating circuit are respectively and electrically connected with the input end of the comparator;
the reference voltage generating circuit is used for outputting a reference voltage, when the printing resin is in a first state, the first probe and the second probe are disconnected, the detection voltage of the second end of the second resistor is smaller than the reference voltage, and the comparator is used for outputting a first feedback control signal when the detection voltage is smaller than the reference voltage so as to control an automatic feeding module of the three-dimensional printer to close an automatic feeding function.
2. The detection circuit of claim 1, further comprising:
the indication circuit comprises a switch circuit and an alarm circuit;
the output end of the comparator is electrically connected with the input end of the switching circuit, and the output end of the switching circuit is electrically connected with the input end of the alarm circuit;
the switch circuit is used for outputting a trigger signal when receiving the first feedback control signal, and the alarm circuit is used for outputting alarm information when receiving the trigger signal.
3. The detection circuit of claim 2, wherein,
the switching circuit includes a first transistor;
the alarm circuit comprises a light-emitting transistor;
the output end of the comparator is electrically connected with the first end of the first transistor, the second end of the first transistor is connected with the high level and the first end of the light emitting transistor, the third end of the first transistor is grounded, and the second end of the light emitting transistor is connected with the high level;
the alarm information comprises an optical signal generated by the light emitting transistor.
4. The detection circuit of claim 1, wherein the detection circuit comprises a logic circuit,
the reference voltage generation circuit comprises a voltage dividing resistor and a variable resistor;
the first end of the voltage dividing resistor is connected with a high level, the second end of the voltage dividing resistor is connected with the first end of the variable resistor, and the second end of the variable resistor is grounded;
the second end of the voltage dividing resistor is electrically connected with the input end of the comparator, and the variable resistor is used for adjusting the reference voltage by changing the resistance value.
5. The detection circuit of claim 2, further comprising:
the device comprises a main control module, a man-machine interaction module and an automatic feeding module;
the input end of the main control module is electrically connected with the output end of the switch circuit, and the output end of the main control module is electrically connected with the man-machine interaction module and the automatic feeding module respectively;
the main control module is used for controlling the man-machine interaction module to output feedback information and controlling the automatic feeding module to close an automatic feeding function when receiving the trigger signal output by the switch circuit;
the feedback information includes alarm information and image information.
6. The detection circuit of claim 1, wherein the detection circuit further comprises:
when the printing resin is changed from the first state to the second state, the first probe and the second probe are electrically conducted, the detection voltage of the second end of the second resistor is larger than the reference voltage, and the comparator is used for outputting a second feedback control signal to switch the automatic feeding function of the automatic feeding module from the off state to the on state when the detection voltage is larger than the reference voltage.
7. A test device comprising a test circuit as claimed in any one of claims 1 to 6, and a container, an end cap, a first test lever and a second test lever;
the container and the end cover enclose a containing cavity, the containing cavity is used for containing the printing resin, the first end of the first detection rod and the first end of the second detection rod are respectively connected to the end cover in a penetrating way, the first detection rod and the second detection rod extend in the containing cavity along the lifting direction of the printing resin liquid level, the second end of the first detection rod and the second end of the second detection rod are opposite to the bottom wall of the container, and the second end of the first detection rod and the second end of the second detection rod are used for detecting the printing resin;
the end cover is detachably connected with the container, and the first detection rod and the second detection rod are conductors.
8. The detecting device according to claim 7, wherein,
the first end of the first detection rod and the first end of the second detection rod are respectively provided with an interface end at the end cover, and the two interface ends are respectively used for being electrically connected with the first probe and the second probe through data wires;
the first probe of the detection circuit detects the printing resin through the second end of the first detection rod, the second probe of the detection circuit detects the printing resin through the second end of the second detection rod, and the first probe is electrically communicated with the second probe when the first detection rod and the second detection rod detect the printing resin.
9. The detecting device according to claim 8, wherein,
when the first detection rod and/or the second detection rod does not detect the printing resin, the first probe is not electrically connected with the second probe, and the comparator outputs the first feedback control signal to control an automatic feeding module of the three-dimensional printer to close an automatic feeding function.
10. A printing system comprising a detection apparatus as claimed in any one of claims 7 to 9 and a three-dimensional printer.
CN202111678174.XA 2021-12-31 2021-12-31 Detection circuit, detection device and printing system Pending CN116408971A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111678174.XA CN116408971A (en) 2021-12-31 2021-12-31 Detection circuit, detection device and printing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111678174.XA CN116408971A (en) 2021-12-31 2021-12-31 Detection circuit, detection device and printing system

Publications (1)

Publication Number Publication Date
CN116408971A true CN116408971A (en) 2023-07-11

Family

ID=87055185

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111678174.XA Pending CN116408971A (en) 2021-12-31 2021-12-31 Detection circuit, detection device and printing system

Country Status (1)

Country Link
CN (1) CN116408971A (en)

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