CN210515017U - Dry-mixed mortar controller - Google Patents

Abstract

The utility model discloses a dry-mixed mortar controller. The display device comprises a shell and a rear cover plate capable of covering an opening of the shell, wherein a display window is arranged on a front panel of the shell, and a display circuit board is arranged in the shell and corresponds to the front panel; the outer side of the rear cover plate is provided with a weighing sensor interface and an external power supply interface, the inner side of the rear cover plate is provided with a dry-mixed mortar control circuit board, the dry-mixed mortar control circuit board is electrically connected with the display circuit board through a flat cable, and the dry-mixed mortar control circuit board is electrically connected with the weighing sensor interface and the external power supply interface; the dry-mixed mortar control circuit board comprises a single chip microcomputer, a weighing conversion circuit and a power circuit. The utility model discloses an input of conversion circuit weighs the analog signal that weighs that comes from the weighing sensor interface, and conversion circuit weighs's output digital weighing signal transmission gives the singlechip, and rethread display circuit board shows the percentage of weighing data and dry mixture mortar in the mortar jar.

Description

Dry-mixed mortar controller

Technical Field

The utility model relates to a mortar control technical field especially relates to a dry-mixed mortar controller.

Background

The dry mixed mortar is applied to the field of building construction, and provides corresponding dry mixed mortar according to actual use needs. But when the dry mixture mortar is weighed, the dry mixture mortar is poured into the mortar tank for weighing, and the weighed data is subtracted to obtain the weight of the mortar tank, namely the weight of the dry mixture mortar in the mortar tank. It is therefore a consideration to provide a dry mix mortar controller that facilitates weighing, displaying weighing data and dry mix mortar status.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides a dry-mixed mortar controller, solves among the prior art dry-mixed mortar controller problem that is not convenient for weigh, lack accurate demonstration.

In order to solve the technical problem, one technical solution adopted by the present invention is to provide a dry-mixed mortar controller, which comprises a housing and a rear cover plate capable of covering an opening of the housing, wherein a display window is arranged on a front panel of the housing, and a display circuit board is arranged in the housing at a position corresponding to the front panel; the outer side of the rear cover plate is provided with a weighing sensor interface and an external power supply interface, the inner side of the rear cover plate is provided with a dry-mixed mortar control circuit board, the dry-mixed mortar control circuit board is electrically connected with the display circuit board through a flat cable, and the dry-mixed mortar control circuit board is electrically connected with the weighing sensor interface and the external power supply interface; the dry mixed mortar control circuit board comprises a single chip microcomputer, a weighing conversion circuit and a power circuit; the power circuit is connected with an external power supply and is converted into a first direct-current power supply for supplying power to the weighing conversion circuit and a second direct-current power supply for supplying power to the single chip microcomputer; the single chip microcomputer is electrically connected with the weighing conversion circuit, the weighing conversion circuit comprises a chip HX710A, an analog signal input end of the chip HX710A is correspondingly and electrically connected with an analog signal output end from the weighing sensor interface, a digital signal output end and a clock signal output end of the chip HX710A are respectively and electrically connected with two input and output ends of the single chip microcomputer through a digital interface circuit and a clock control circuit, the chip HX710A collects analog weighing signals from the weighing sensor interface, converts the analog weighing signals into digital weighing signals and transmits the digital weighing signals to the single chip microcomputer, and weighing data are displayed through a display circuit board.

Preferably, the weighing sensor interface is electrically connected with a weighing conversion circuit on the dry-mixed mortar control circuit board through a wiring terminal on the inner side of the rear cover plate, and the wiring terminal on the outer side of the rear cover plate is correspondingly and electrically connected with the weighing sensor of the dry-mixed mortar tank end pin; and the external power supply interface is electrically connected with the power supply circuit on the dry mixed mortar control circuit board through the wiring terminal on the inner side of the rear cover plate, and the wiring terminal on the outer side of the rear cover plate is connected with an external power supply.

Preferably, a first connecting column with a threaded hole is arranged in the housing, a first connecting hole is correspondingly arranged on the display circuit board, and the display circuit board is screwed and fixed on the first connecting column by passing through the first connecting hole through a screw; and a second connecting hole is formed in the dry mixed mortar control circuit board, a second connecting column with a threaded hole is arranged at a corresponding position on the inner side of the rear cover plate, and a screw penetrates through the second connecting hole to fix the dry mixed mortar control circuit board on the second connecting column.

Preferably, a vertical protrusion is arranged around the periphery of the opening of the shell, and a groove correspondingly matched with the protrusion is arranged on the periphery of the inner side of the rear cover plate; butt joint holes with threaded holes are formed in four end corners of the shell, and through holes are formed in the corresponding positions of the four end corners of the rear cover plate; when the rear cover plate covers the opening of the shell, the bulge on the opening of the shell is tightly matched with the groove on the rear cover plate, and the bulge passes through the through hole on the rear cover plate through a screw and is screwed and fixed in the butt joint hole on the shell.

Preferably, a reference voltage input end of the chip HX710A is connected in series with a first inductor and a second inductor and then connected to a power supply anode of the weighing sensor, an electrical connection point of the first inductor and the second inductor is further electrically connected to a first direct current power supply, and a ground terminal is grounded and is also electrically connected to a power supply cathode of the weighing sensor after being electrically connected to a third inductor; the analog signal input end of the chip HX710A comprises a negative signal input end and a positive signal input end, the negative signal input end is electrically connected with a first signal input resistor, the other end of the first signal input resistor is electrically connected with a signal cathode of the weighing sensor after being connected with a fourth inductor, the positive signal input end is electrically connected with a second signal input resistor, and the other end of the second signal input resistor is electrically connected with a signal anode of the weighing sensor after being connected with a fifth inductor.

Preferably, the digital interface circuit comprises a first voltage-dividing resistor and a second voltage-dividing resistor which are connected in series, and the single chip microcomputer is a chip STM32F 030C; the data output end of the chip HX710A is electrically connected with one end of the first voltage-dividing resistor, the other end of the first voltage-dividing resistor is connected with an input/output end of the chip STM32F030C, the other end of the first voltage-dividing resistor is also electrically connected with the second voltage-dividing resistor and then is grounded, high voltage in a digital weighing signal output by the data output end of the chip HX710A corresponds to voltage of the first direct-current power supply, and after voltage division of the first voltage-dividing resistor and the second voltage-dividing resistor, the high voltage input to the chip STM32F030C corresponds to voltage of the second direct-current power supply.

Preferably, the clock control circuit comprises a control triode, a collector of the control triode is connected with a first current-limiting resistor in series and then is connected with the first direct-current power supply, the collector is also connected with a second current-limiting resistor in series and then is connected with a clock signal input end of the chip HX710A, an emitter is grounded, a base is connected with one end of a third current-limiting resistor, and the other end of the third current-limiting resistor is used as a weighing signal control end and is connected with an input/output end of the chip STM32F 030C; when the dry-mixed mortar tank is weighed, the single chip microcomputer outputs a clock signal to the weighing signal control end, the control triode is correspondingly controlled to be continuously switched on and switched off, and the high voltage of the clock signal input by the clock signal input end of the chip HX710A corresponds to the voltage of the first direct-current power supply.

Preferably, the power supply circuit includes a first-order power supply circuit that changes alternating current into direct current and a second-order power supply circuit that steps down the direct current; the first-order power circuit comprises a switching power module, the input end of the switching power module is electrically connected with one wiring end of a common-mode inductor and then is connected to the live wire end of the power interface, the grounding end of the switching power module is electrically connected with the other wiring end of the common-mode inductor and then is connected to the zero wire end of the power interface, and the output end of the switching power module outputs +24V direct-current voltage; the second-order power supply circuit comprises a chip LM2596, wherein the input end of the chip LM2596 is connected with +24V direct-current voltage, the output end of the chip LM2596 outputs the first direct-current power supply, the second-order power supply further comprises a chip AMS1117-3.3, the power supply input end of the AMS1117-3.3 is electrically connected with the output end of the chip LM2596, and the output end of the power supply of the AMS1117-3.3 outputs the second direct-current power supply.

Preferably, the display circuit board comprises a chip TM1638 and a digital display tube, a chip selection end of the chip TM1638 is connected with a chip selection end of the single chip microcomputer, and is connected with a second direct-current power supply after being connected with a chip selection current-limiting resistor, a clock end of the chip TM1638 is electrically connected with a clock signal output end of the single chip microcomputer and is connected with a pull-up resistor and then is connected with the second direct-current power supply, a data end of the chip TM1638 is connected with an input/output end of the single chip microcomputer and is also electrically connected with a pull-up resistor and then is connected with the second direct-current power supply; the digital display tube comprises a first digital display tube and a second digital display tube which are both 3-bit common-anode digital tubes, wherein the common anode of each digital display tube is respectively connected with one output bit of the chip TM1638, three bit selection segments of the first digital display tube are correspondingly connected with a first output segment to a third output segment of the chip TM1638, and three bit selection segments of the second digital display tube are correspondingly connected with a fourth output segment to a sixth output segment of the chip TM 1638; the grounding end of the chip TM1638 is grounded, and the power end is electrically connected with the first direct current power supply.

Preferably, the chip TM1638 is further connected to a state display circuit, the state display circuit includes a plurality of display branches which are formed by the same circuit, each display branch includes a light emitting diode and a current limiting resistor, a cathode of the light emitting diode is connected in series with one end of the current limiting resistor, another end of the current limiting resistor is connected to an output bit of the chip TM1638, and an anode of the light emitting diode is electrically connected to the seventh output segment of the chip TM 1638.

The utility model has the advantages that: the utility model discloses a dry-mixed mortar controller. The display device comprises a shell and a rear cover plate capable of covering an opening of the shell, wherein a display window is arranged on a front panel of the shell, and a display circuit board is arranged in the shell and corresponds to the front panel; the outer side of the rear cover plate is provided with a weighing sensor interface and an external power supply interface, the inner side of the rear cover plate is provided with a dry-mixed mortar control circuit board, the dry-mixed mortar control circuit board is electrically connected with the display circuit board through a flat cable, and the dry-mixed mortar control circuit board is electrically connected with the weighing sensor interface and the external power supply interface; the dry-mixed mortar control circuit board comprises a single chip microcomputer, a weighing conversion circuit and a power circuit. The utility model discloses an input of conversion circuit weighs the analog signal that weighs that comes from the weighing sensor interface, and conversion circuit weighs's output digital weighing signal transmission gives the singlechip, and rethread display circuit board shows the percentage of weighing data and dry mixture mortar in the mortar jar.

Drawings

FIG. 1 is a schematic view of the inside of a housing according to an embodiment of the dry-mixed mortar controller of the present invention;

FIG. 2 is a schematic view of the outside of a housing according to an embodiment of the dry-mixed mortar controller of the present invention;

FIG. 3 is a schematic view of the inside of a rear cover plate according to an embodiment of the dry-mixed mortar controller of the present invention;

FIG. 4 is a schematic view of the outside of the back cover plate according to an embodiment of the dry-mixed mortar controller of the present invention;

FIG. 5 is a block diagram of the circuit configuration of an embodiment of the dry-mixed mortar controller according to the present invention;

FIG. 6 is a first order power supply circuit in an embodiment of a dry-mixed mortar controller according to the present invention;

FIG. 7 is a second-order power supply circuit according to an embodiment of the present invention;

FIG. 8 is a single chip microcomputer circuit according to an embodiment of the dry-mixed mortar controller of the present invention;

FIG. 9 is a weighing circuit according to an embodiment of the dry-mixed mortar controller of the present invention;

FIG. 10 is a TM1638 chip in the display circuit according to an embodiment of the dry-mixed mortar controller of the present invention;

FIG. 11 is a first nixie tube in a display circuit according to an embodiment of the dry-mixed mortar controller of the present invention;

FIG. 12 is a second digital tube in the display circuit according to one embodiment of the dry-mixed mortar controller of the present invention;

fig. 13 is a mortar status display circuit according to an embodiment of the dry-mixed mortar controller of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It is to be noted that, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

With reference to fig. 1 to 4, the dry-mixed mortar controller includes a housing S1 and a rear cover plate S2 capable of covering an opening of the housing, fig. 1 is a schematic view of the housing of the intelligent dry-mixed mortar controller, and fig. 2 is a schematic view of a front panel of the housing.

In fig. 2, a front panel S3 of a casing S1 is provided with a display window S4, and a display circuit board D1 is provided inside the casing S1 in fig. 1 at a position corresponding to the front panel S3. A plurality of first connection posts S101 with threaded holes are arranged in the casing S1, a plurality of first connection holes S102 are correspondingly arranged on the display circuit board D1, and the display circuit board D1 is screwed and fixed on the corresponding first connection posts S101 by screws passing through the plurality of first connection holes S102.

Fig. 3 is a schematic view of the inside surface of the back cover plate. In fig. 3, the inner side of the rear cover plate S2 is provided with a dry-mixed mortar control circuit board D2, the dry-mixed mortar control circuit board D2 and the display circuit board D1 in fig. 1 are both provided with a flat cable interface, the dry-mixed mortar control circuit board D2 is electrically connected with the display circuit board D1 through a flat cable, and data display on the dry-mixed mortar control circuit board D2 is realized through the display circuit board D1.

A plurality of second connecting holes S202 are formed in the dry-mixed mortar control circuit board D2, a plurality of second connecting columns S201 with threaded holes are arranged at corresponding positions on the inner side of the rear cover plate S2, and screws penetrate through the second connecting holes S202 to fix the dry-mixed mortar control circuit board S2 on the second connecting columns S201.

Fig. 4 is an outside view of the rear cover plate. In fig. 4, a load cell interface S5 and an external power supply interface S6 are arranged on the outer side of the rear cover plate S2, the load cell interface S5 is electrically connected to a load conversion circuit on the dry-mixed mortar control circuit board D2 at the terminal on the inner side of the rear cover plate S2, and the load cell of the dry-mixed mortar tank terminal pin is correspondingly and electrically connected to the terminal on the outer side of the rear cover plate S2; the external power interface S6 is electrically connected with the power circuit on the dry-mixed mortar control circuit board D2 through the terminals on the inner side of the rear cover plate S2, and is connected with an external power supply through the terminals on the outer side of the rear cover plate S2.

Referring to fig. 1 and 3, a vertical protrusion S7 is provided around the circumference of the opening of the case, and a groove S8 corresponding to the protrusion S7 is provided on the inner circumference of the rear cover plate S2. The four corners of the casing S1 are provided with docking holes S9 having threaded holes, and the corresponding positions of the four corners of the rear cover plate S2 are provided with through holes S10.

When the rear cover plate S2 covers the shell opening, the protrusion S7 on the shell opening is tightly matched with the groove S8 on the rear cover plate S2, and the shell S1 and the rear cover plate S2 are connected by passing a screw through the through hole S10 on the rear cover plate S2 and screwing and fixing the screw in the butt joint hole S9 on the shell S1.

As shown in fig. 5, the dry-mixed mortar control circuit board comprises a single chip microcomputer 1, a weighing conversion circuit 2 and a power circuit 4, and the display circuit board comprises a display circuit 3. The power circuit 3 is connected with an external power supply through an external power supply interface and is converted into a first direct-current power supply for supplying power to the weighing conversion circuit 2 and a second direct-current power supply for supplying power to the singlechip 1; the single chip microcomputer 1 is respectively and electrically connected with the weighing conversion circuit 2 and the display circuit 3.

Power supply circuit 4 is respectively to weighing conversion circuit 2, singlechip 1 and display circuit 3 power supply, weighing conversion circuit 2 connects the weighing sensor who sets up at dry mixture mortar jar end foot, the analog signal that weighs that weighing sensor gathered is weighing digital signal through weighing conversion circuit conversion, singlechip 1 control weighing conversion circuit 2 with the digital signal transmission that weighs that surveys to singlechip 1, the singlechip shows weighing data through display circuit 3.

Preferably, the dry mixture mortar tank is provided with three end pins or four end pins which are uniformly distributed in the circumferential direction, and each end pin is provided with a weighing sensor. Certainly, the mortar tank can also be provided with a plurality of end feet which are uniformly distributed in the circumferential direction so as to obtain better supporting effect.

The utility model discloses preferred mortar jar has four end feet and sets up four weighing sensor at this end foot, and during the weighing, the weight evenly distributed of mortar is in these four end feet, and every end foot bears the fourth of the whole weight of mortar, and the weighing signal who obtains on every weighing sensor promptly is the fourth of the whole weight of mortar, the utility model discloses a link together every wiring end correspondence of these four weighing sensor, and every weighing sensor's simulation weighing signal looks interconnect promptly, every weighing sensor's power negative pole interconnect, weighing sensor's the anodal interconnect of power, last together input to the conversion circuit that weighs, export holistic mortar weight after the singlechip operation.

The power supply circuit includes a first-order power supply circuit that converts alternating current into direct current and a second-order power supply circuit that steps down the direct current voltage.

As shown IN fig. 6, the first-order power circuit includes a switching power module U3, an input terminal IN of the switching power module U3 is connected to a fourth terminal of a common-mode inductor L6, a first terminal of the inductor L6 is connected to a live line L of the alternating current after being connected to a protection resistor FU1, a ground terminal GND of the switching power module is connected to a third terminal of the common-mode inductor L6, a second terminal of the common-mode inductor L6 is connected to a thermistor NTC1, the other end of the thermistor NTC1 is connected to a neutral line N of the alternating current, the protection resistor FU1 is further connected to one end of a varistor FU2, and the other end of the varistor FU2 is connected to the thermistor NTC 1.

Preferably, a capacitor C19 is further connected between the first terminal and the second terminal of the common-mode inductor L6, a capacitor C20 is further connected between the third terminal and the fourth terminal of the common-mode inductor L6, alternating current is limited by a protection resistor FU1, capacitors (C19 and C20) are decoupled, and the common-mode inductor is connected into the switching power supply module U3 after being filtered. The switching power supply module U3 can convert the ac voltage (120-500V) into +24V dc voltage for output.

As shown in fig. 7, the second-order power circuit includes a chip LM2596, an input terminal Vin of the chip LM2596 is connected to a +24V dc voltage, an output terminal Vout is connected to a cathode of a schottky diode D1, an anode of the schottky diode D1 is grounded, the output terminal Vout is also connected to an inductor L7, the other terminal of the inductor L7 is connected to an anode of a first polarity capacitor C27, a cathode of the first polarity capacitor C27 is grounded, an anode of the first polarity capacitor C27 outputs a +5V power supply for supplying power to the weight conversion circuit, the anode of the first polarity capacitor C27 is also electrically connected to a feedback terminal FBack of the chip LM2596, a switch terminal on/off of the chip LM2596 is grounded, and other pin terminals of the chip LM2596 are grounded. Preferably, the positive electrode of the first polarity capacitor C27 is connected to the capacitors C25, C28 and C26, respectively, and then grounded.

The positive electrode of the first polarity capacitor C27 is also connected to the input end of the forward low dropout regulator AMS1117-3.3, the output end of the forward low dropout regulator AMS1117-3.3 outputs a +3.3V power supply for supplying power to the single chip microcomputer, and the grounding end of the forward low dropout regulator AMS1117-3.3 is grounded. Preferably, the output end of the forward low dropout regulator AMS1117-3.3 is electrically connected with the capacitor C21 and the capacitor C22 respectively and then grounded.

The second-order power supply circuit can convert a +24V direct-current power supply into a +5V power supply for supplying power to the weighing conversion circuit and a +3.3V power supply for supplying power to the single chip microcomputer.

As shown in fig. 8, the single chip microcomputer is a chip STM32F030C, the single chip microcomputer is a power supply end of the chip STM32F030C and is electrically connected with a +3.3V power supply, a reset end NRST of the chip STM32F030C is electrically connected with a reset resistor and then is connected with the +3.3V power supply, the chip STM32F030 3826 is also connected with a capacitor C5 and then is grounded, and a pin BOOT1 of the chip STM32F030C is electrically connected with a resistor R2 and.

As shown in fig. 9, the load conversion circuit includes a chip HX710A, a reference voltage input terminal VREF of the chip HX710A is connected in series with a first inductor L1 and a second inductor L2 and then connected to a positive power supply E + of the load cell interface, an electrical connection point of the first inductor L1 and the second inductor L2 is further electrically connected to a first dc power supply VCC5V, a ground terminal AGND is grounded and is also electrically connected to a negative power supply E-of the load cell after being electrically connected to a third inductor L3. The analog signal input end of the chip HX710A is correspondingly and electrically connected with the analog signal output end of the weighing sensor interface, namely, the negative signal input end Ain-is electrically connected with the first signal input resistor R7, the other end of the first signal input resistor R7 is electrically connected with the fourth inductor L4 and then is connected with the signal cathode S-, the positive signal input end Ain + is electrically connected with the second signal input resistor R10, and the other end of the second signal input resistor R10 is electrically connected with the signal anode S-of the weighing sensor interface after the fifth inductor L5.

A reference voltage input end VREF of the chip HX710A is electrically connected to the analog power supply access end AVDD, a digital power supply input end DVDD of the chip HX710A is electrically connected to the first dc power supply VCC5V (the first dc power supply VCC5V in fig. 9 is the same as the +5V power supply output by the second-order dc power supply in fig. 7), and is also connected in series with the capacitor C9 and then grounded, a data output end DOUT of the chip HX710A is electrically connected to the digital interface circuit and then connected to an input/output end of the single chip, the digital interface circuit realizes voltage conversion between interfaces, that is, the +5V voltage output by the chip HX710A is converted into +3.3V voltage to be output to the single chip.

The digital interface circuit comprises a first voltage-dividing resistor R5 and a second voltage-dividing resistor R4, a data output end DVDD of a chip HX710A is electrically connected with the first voltage-dividing resistor R5, the other end of the first voltage-dividing resistor R5 is connected to an input/output end PA12 of the single chip microcomputer in fig. 4, a free end of the first voltage-dividing resistor in fig. 9 is marked with PA12, an input/output end of the single chip microcomputer in fig. 8 is also marked with PA12 to show that the first voltage-dividing resistor R5 is electrically connected with the second voltage-dividing resistor R4, and then the other end of the first voltage-dividing resistor R5 is grounded. The high voltage in the digital weighing signal output by the data output end of the chip HX710A corresponds to the voltage +5V of the first DC power supply, and after the voltage is divided by the first voltage dividing resistor R5 and the second voltage dividing resistor R4, the high voltage +3.3V input to the singlechip corresponds to the voltage of the second DC power supply.

The clock signal input end SLCK of the chip HX710A is electrically connected with the clock control circuit and then is connected with one input end and one output end of the singlechip. The clock control circuit comprises a control triode Q1, a collector of the control triode Q1 is connected with a first current-limiting resistor R9 in series and then is connected with a first direct-current power supply VCC5V, the control triode Q1 is also connected with a second current-limiting resistor R6 and then is connected with a clock signal input end SCLK of a chip HX710A, an emitter is grounded, a base is connected with one end of a third current-limiting resistor R8, and the other end of the third current-limiting resistor R8 is connected with an input and output end PA11 of the single chip microcomputer in the figure 8 as a weighing signal control.

When the dry-mixed mortar tank is weighed, the single chip microcomputer outputs a clock signal to the weighing signal control end, the control triode Q1 is correspondingly controlled to be continuously switched on and switched off, and the high voltage of the clock signal input by the clock signal input end SCLK of the chip HX710A corresponds to the voltage of the first direct-current power supply, namely +5V voltage.

Preferably, in fig. 9, a reference voltage input terminal VREF of the chip HX710A is electrically connected to the first filter capacitor C11, and is connected to the ground AGND, and an electrical connection point between the first inductor L1 and the second inductor L2 is respectively connected to the second filter capacitor C12 and the third filter capacitor C13, and then is grounded; the grounding end AGND of the chip HX710A is electrically connected with the fourth filter capacitor C15 and then is connected to the negative signal input end Ain-, the fourth inductor L4 is electrically connected with the fifth filter capacitor C14 and then is grounded, the negative signal input end Ain-is electrically connected with the sixth filter capacitor C16 and then is connected to the positive signal input end Ain +, the positive signal input end Ain + is also connected with the seventh filter capacitor C18 and then is grounded, and the electric connection part of the second signal input resistor R10 and the fifth inductor L5 is connected with the eighth filter capacitor C17 and then is grounded.

The filter capacitors are arranged to prevent mutual interference between signals input by the weighing sensor, and the inductors (L1-L5) are all magnetic bead inductors and have the same function.

As shown in fig. 10, the display circuit includes a chip TM1638 for driving a nixie tube or a diode. The chip selection end STB of the chip TM1638 is connected with the chip selection end of the single chip microcomputer in the figure 8, the chip selection current-limiting resistor R8 is connected and then connected with a +3.3V power supply, the clock end CLK is electrically connected with the clock signal output end of the single chip microcomputer, the pull-up resistor R10 is connected and then connected with the +3.3V power supply, the data end DIO is connected with the input and output end of the single chip microcomputer, and the pull-up resistor R14 is electrically connected and then connected with the +3.3V power supply. The power supply end is electrically connected with a +5V power supply, the positive electrode of the polar capacitor C2 and the negative electrode of the polar capacitor C2 are grounded, and the preferred power supply end is also electrically connected with the positive electrode of the polar capacitor C1 and the negative electrode of the polar capacitor C1 is grounded.

As shown in fig. 11 and 12, the digital display tubes include a first digital display tube and a second digital display tube, both of which are 3-bit common-anode digital tubes, fig. 11 is the first digital display tube, and fig. 12 is the second digital display tube. The common anode of each digital display tube is respectively connected with an output bit of the chip TM1638 in fig. 10, that is, the common anode (a-DP) of each digital display tube is respectively connected with the output bits (GR1-GR8) of the chip TM1638 in a one-to-one correspondence manner, the free end of the common anode a in fig. 11 and fig. 12 is marked with LEDA characters, the free end of the output bit GR1 of the chip TM1638 is also marked with LEDA characters to indicate the mutual connection, and the rest are similar to each other, and are not repeated herein.

In FIG. 11, the first digital display tube has three bit-selective segments (DIG1-DIG3) corresponding to the first to third output segments (SEG1/K1-SEG3/K3) of the TM1638 chip in FIG. 10, and the second digital display tube has three bit-selective segments (DIG1-DIG3) corresponding to the fourth to sixth output segments (SEG4/K4-SEG6/K6) of the TM1638 chip in FIG. 12. The ground terminal of the chip TM1638 is grounded.

As shown in fig. 13, the chip TM1638 is further connected to a status display circuit, where the status display circuit includes a plurality of display branches that are formed by the same circuit, each display branch includes a light emitting diode and a current limiting resistor, a cathode of the light emitting diode is connected in series with one end of the current limiting resistor, another end of the current limiting resistor is connected to an output bit of the chip TM1638, and an anode of the light emitting diode is electrically connected to the seventh output segment of the chip TM 1638. For example, the LED1 is electrically connected to the resistor R1 and then connected to the output bit GR1 of the chip TM1638 in fig. 10, and other light emitting diodes are similar to the resistor R, and are not described herein again. The anode of each led is electrically connected to the seventh output segment of TM1638 of fig. 10, that is, the seventh output terminal supplies power to the leds, and the value of the power is + 5V.

Preferably, each display branch is used for displaying the weight percentage of the dry-mixed mortar, for example, 6 display branches are included, which respectively correspond to 0%, 20%, 40%, 60%, 80%, 100% of the dry-mixed mortar. In fig. 13, the LED1 represents 0%, the LED3 represents 20%, the LED4 represents 40%, the LED6 represents 60%, the LED8 represents 80%, and the LED9 represents 100%, which are respectively provided longitudinally on the left side of the level state display window of the front panel in fig. 2. The weight percentage here refers to the ratio of the actual weight of the dry mixture mortar to the weight of the dry mixture mortar when the mortar tank is fully loaded, that is, the real-time material level information of the dry mixture in the mortar tank relative to the full bin is represented, such as: when the tank level was 2/5, the three "0%, 20%, and 40%" LEDs were on, indicating a 40% state.

The status display circuit can display the percentage of the dry-mixed mortar in the mortar tank, and the dry-mixed mortar can be conveniently observed at any time when being added, so that overload is avoided.

Therefore, the utility model discloses a dry-mixed mortar controller. The display device comprises a shell and a rear cover plate capable of covering an opening of the shell, wherein a display window is arranged on a front panel of the shell, and a display circuit board is arranged in the shell and corresponds to the front panel; the outer side of the rear cover plate is provided with a weighing sensor interface and an external power supply interface, the inner side of the rear cover plate is provided with a dry-mixed mortar control circuit board, the dry-mixed mortar control circuit board is electrically connected with the display circuit board through a flat cable, and the dry-mixed mortar control circuit board is electrically connected with the weighing sensor interface and the external power supply interface; the dry-mixed mortar control circuit board comprises a single chip microcomputer, a weighing conversion circuit and a power circuit. The utility model discloses an input of conversion circuit weighs the analog signal that weighs that comes from the weighing sensor interface, and conversion circuit weighs's output digital weighing signal transmission gives the singlechip, and rethread display circuit board shows the percentage of weighing data and dry mixture mortar in the mortar jar.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the same principle as the present invention.

Claims (10)

1. A dry-mixed mortar controller is characterized by comprising a shell and a rear cover plate capable of covering an opening of the shell, wherein a display window is arranged on a front panel of the shell, and a display circuit board is arranged in the shell at a position corresponding to the front panel;

the outer side of the rear cover plate is provided with a weighing sensor interface and an external power supply interface, the inner side of the rear cover plate is provided with a dry-mixed mortar control circuit board, the dry-mixed mortar control circuit board is electrically connected with the display circuit board through a flat cable, and the dry-mixed mortar control circuit board is electrically connected with the weighing sensor interface and the external power supply interface;

the dry mixed mortar control circuit board comprises a single chip microcomputer, a weighing conversion circuit and a power circuit; the power circuit is connected with an external power supply and is converted into a first direct-current power supply for supplying power to the weighing conversion circuit and a second direct-current power supply for supplying power to the single chip microcomputer; the weighing conversion circuit comprises a chip HX710A, wherein an analog signal input end of the chip HX710A is electrically connected with an analog signal output end from a weighing sensor interface correspondingly, a digital signal output end and a clock signal output end of the chip HX710A are electrically connected with two input and output ends of the single chip microcomputer through a digital interface circuit and a clock control circuit respectively, the chip HX710A collects an analog weighing signal from the weighing sensor interface, converts the analog weighing signal into a digital weighing signal and transmits the digital weighing signal to the single chip microcomputer, and weighing data are displayed through a display circuit board.

2. The dry-mixed mortar controller according to claim 1, wherein the weighing sensor interface is electrically connected with the weighing conversion circuit on the dry-mixed mortar control circuit board at a terminal on the inner side of the rear cover plate, and the weighing sensor of the dry-mixed mortar tank terminal pin is correspondingly and electrically connected with the terminal on the outer side of the rear cover plate; and the external power supply interface is electrically connected with the power supply circuit on the dry mixed mortar control circuit board through the wiring terminal on the inner side of the rear cover plate, and the wiring terminal on the outer side of the rear cover plate is connected with an external power supply.

3. The dry-mixed mortar controller according to claim 2, wherein a first connecting column with a threaded hole is arranged in the housing, a first connecting hole is correspondingly arranged on the display circuit board, and the display circuit board is screwed and fixed on the first connecting column by a screw through the first connecting hole;

and a second connecting hole is formed in the dry mixed mortar control circuit board, a second connecting column with a threaded hole is arranged at a corresponding position on the inner side of the rear cover plate, and a screw penetrates through the second connecting hole to fix the dry mixed mortar control circuit board on the second connecting column.

4. The dry-mixed mortar controller according to claim 3, wherein a vertical protrusion is provided around the periphery of the opening of the housing, and a groove corresponding to the protrusion is provided on the inner periphery of the rear cover plate;

butt joint holes with threaded holes are formed in four end corners of the shell, and through holes are formed in the corresponding positions of the four end corners of the rear cover plate;

when the rear cover plate covers the opening of the shell, the bulge on the opening of the shell is tightly matched with the groove on the rear cover plate, and the bulge passes through the through hole on the rear cover plate through a screw and is screwed and fixed in the butt joint hole on the shell.

5. The dry-mixed mortar controller according to claim 4, wherein a reference voltage input end of the chip HX710A is connected in series with a first inductor and a second inductor and then connected to a power supply anode of the weighing sensor, an electric connection position of the first inductor and the second inductor is also electrically connected to a first direct current power supply, a grounding end is grounded and is also electrically connected to a third inductor and then connected to a power supply cathode of the weighing sensor;

the analog signal input end of the chip HX710A comprises a negative signal input end and a positive signal input end, the negative signal input end is electrically connected with a first signal input resistor, the other end of the first signal input resistor is electrically connected with a signal cathode of the weighing sensor after being connected with a fourth inductor, the positive signal input end is electrically connected with a second signal input resistor, and the other end of the second signal input resistor is electrically connected with a signal anode of the weighing sensor after being connected with a fifth inductor.

6. The dry-mixed mortar controller according to claim 5, wherein the digital interface circuit comprises a first voltage-dividing resistor and a second voltage-dividing resistor which are connected in series, and the single chip microcomputer is a chip STM32F 030C; the data output end of the chip HX710A is electrically connected with one end of the first voltage-dividing resistor, the other end of the first voltage-dividing resistor is connected with an input/output end of the chip STM32F030C, the other end of the first voltage-dividing resistor is also electrically connected with the second voltage-dividing resistor and then is grounded, high voltage in a digital weighing signal output by the data output end of the chip HX710A corresponds to voltage of the first direct-current power supply, and after voltage division of the first voltage-dividing resistor and the second voltage-dividing resistor, the high voltage input to the chip STM32F030C corresponds to voltage of the second direct-current power supply.

7. The dry-mixed mortar controller according to claim 6, wherein the clock control circuit comprises a control triode, a collector of the control triode is connected with a first current-limiting resistor in series and then is connected with the first direct-current power supply, a collector of the control triode is also connected with a second current-limiting resistor in series and then is connected with a clock signal input end of the chip HX710A, an emitter of the control triode is grounded, a base of the control triode is connected with one end of a third current-limiting resistor, and the other end of the third current-limiting resistor is used as a weighing signal control end and is connected with an input end and an output end of the chip;

when the dry-mixed mortar tank is weighed, the single chip microcomputer outputs a clock signal to the weighing signal control end, the control triode is correspondingly controlled to be continuously switched on and switched off, and the high voltage of the clock signal input by the clock signal input end of the chip HX710A corresponds to the voltage of the first direct-current power supply.

8. The dry-mixed mortar controller according to claim 1, wherein the power supply circuit includes a first-order power supply circuit that changes alternating current to direct current and a second-order power supply circuit that steps down direct current; the first-order power circuit comprises a switching power module, the input end of the switching power module is electrically connected with one wiring end of a common-mode inductor and then is connected to the live wire end of the power interface, the grounding end of the switching power module is electrically connected with the other wiring end of the common-mode inductor and then is connected to the zero wire end of the power interface, and the output end of the switching power module outputs +24V direct-current voltage;

the second-order power supply circuit comprises a chip LM2596, wherein the input end of the chip LM2596 is connected with +24V direct-current voltage, the output end of the chip LM2596 outputs the first direct-current power supply, the second-order power supply further comprises a chip AMS1117-3.3, the power supply input end of the AMS1117-3.3 is electrically connected with the output end of the chip LM2596, and the output end of the power supply of the AMS1117-3.3 outputs the second direct-current power supply.

9. The dry-mixed mortar controller according to claim 8, wherein the display circuit board comprises a chip TM1638 and a digital display tube, a chip selection end of the chip TM1638 is connected with a chip selection end of the single chip microcomputer, and is also connected with a chip selection current limiting resistor and then connected with a second direct current power supply, a clock end of the chip TM1638 is electrically connected with a clock signal output end of the single chip microcomputer and is also connected with a pull-up resistor and then connected with the second direct current power supply, a data end of the chip TM1638 is connected with an input/output end of the single chip microcomputer and is also electrically connected with a pull-up resistor and then connected with the second direct current power supply;

the digital display tube comprises a first digital display tube and a second digital display tube which are both 3-bit common-anode digital tubes, wherein the common anode of each digital display tube is respectively connected with one output bit of the chip TM1638, three bit selection segments of the first digital display tube are correspondingly connected with a first output segment to a third output segment of the chip TM1638, and three bit selection segments of the second digital display tube are correspondingly connected with a fourth output segment to a sixth output segment of the chip TM 1638; the grounding end of the chip TM1638 is grounded, and the power end is electrically connected with the first direct current power supply.

10. The dry-mixed mortar controller according to claim 9, wherein the chip TM1638 is further connected with a status display circuit, the status display circuit comprises a plurality of display branches which are formed by the same circuit, each display branch comprises a light emitting diode and a current limiting resistor, the cathode of the light emitting diode is connected in series with one end of the current limiting resistor, the other end of the current limiting resistor is connected with one output bit of the chip TM1638, and the anode of the light emitting diode is electrically connected with the seventh output segment of the chip TM 1638.

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