CN112763036A - Weighing alarm control circuit, equipment and display instrument - Google Patents
Weighing alarm control circuit, equipment and display instrument Download PDFInfo
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- CN112763036A CN112763036A CN202011536435.XA CN202011536435A CN112763036A CN 112763036 A CN112763036 A CN 112763036A CN 202011536435 A CN202011536435 A CN 202011536435A CN 112763036 A CN112763036 A CN 112763036A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/002—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for postal parcels and letters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/18—Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- 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
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention relates to the technical field of weighing equipment, in particular to a weighing alarm control circuit, weighing alarm control equipment and a display instrument. One of the weighing alarm control circuits comprises a central control unit, a sound alarm control unit, an audio output device and a power supply unit; the first output end of the central control unit is connected with the sound alarm control unit, and the output end of the sound alarm control unit is connected with the audio output device; the central control unit is connected with the power supply unit, and the power supply unit supplies power to the sound alarm control unit and the audio output device through the central control unit; the sound alarm control unit controls the audio output device to output alarm sounds with different decibels by controlling input voltages at two ends of the audio output device. Compared with the prior art, the invention can use high-pitch alarm aiming at noisy environment, does not need to add other power supplies, has simple structure and can meet various requirements of users.
Description
Technical Field
The invention relates to the technical field of weighing equipment, in particular to a weighing alarm control circuit, weighing alarm control equipment and a display instrument.
Background
Along with the continuous improvement of living standard of people, the quantity of logistics express items and packages also increases rapidly, and the express items and the packages need to be weighed and classified according to the weight of the objects in the treatment of the express items and the packages. Therefore, a large number of multifunctional weighing devices or devices are equipped in the daily life of consumers and on the processing line of logistics companies.
Although the chinese patent (application No. CN201920075409.8, published 30.12.2019), discloses an electronic scale based on a single chip microcomputer, which includes a pressure sensor, a signal amplification module, an accurate conversion module, a central processing module, a power supply module, an alarm module, a data storage module, a display module, a key input module, and a serial communication module, the accurate conversion module, the power supply module, the alarm module, the data storage module, the display module, the key input module, and the serial communication module are connected to the central processing module, and the accurate conversion from an analog signal to a digital signal is realized through the accurate conversion, thereby ensuring the accuracy requirement of the electronic scale.
However, the electronic weighing devices widely used in the market still have single alarm prompting function, and cannot meet various requirements of users.
Disclosure of Invention
In order to solve the problem of single alarm function of the electronic weighing equipment in the prior art, the invention provides a weighing alarm control circuit, equipment and a display instrument, wherein the weighing alarm control circuit comprises a central control unit, a sound alarm control unit, an audio output device and a power supply unit; the first output end of the central control unit is connected with the sound alarm control unit, and the output end of the sound alarm control unit is connected with the audio output device; the central control unit is connected with the power supply unit, and the power supply unit supplies power to the sound alarm control unit and the audio output device through the central control unit; the sound alarm control unit controls the audio output device to output alarm sounds of different decibels by controlling input voltages at two ends of the audio output device.
Furthermore, the sound alarm control unit comprises a connecting seat and a voice unit, and the central control unit sends a control signal to the sound alarm control unit through the connecting seat and supplies power to the sound alarm control unit; the input end of the voice unit is connected with the power supply end, the output end of the voice unit is connected with the audio output device, and the voice unit is used for sending an alarm audio signal to the audio output device.
Furthermore, the sound alarm control unit further comprises a high-voltage control unit, a voltage stabilizing unit and a low-voltage control unit, and the connecting seat is provided with a first signal end SP1, a second signal end SP2, a power supply end and a grounding end; the low-voltage control unit is respectively connected with the first signal terminal SP1, the output terminal of the voltage stabilizing unit and the output terminal of the voice unit, the input terminal of the voltage stabilizing unit is connected with the power supply terminal, and the voltage stabilizing unit is used for stabilizing the voltage of the input terminal and then outputting a voltage lower than the voltage of the input terminal; the high voltage control unit is respectively connected with the second signal terminal SP2, the power supply terminal and the output terminal of the voice unit.
Further, the voice unit comprises a voice chip U21, the model of the voice chip U21 is LC9801R, the VCC end of the voice chip U21 is connected with the power supply end, and the voltage of the power supply end is + 5V; the OUT end of the voice chip U21 is connected to the base of a triode Q2, the OUT end is used for outputting audio signals, the emitter of the triode Q2 is grounded, the collector of the triode Q2 is connected to the first end of a three-pin inductor L1, the second end of the three-pin inductor L1 is connected to the cathode of the audio output device, the power pin of the three-pin inductor L1 is connected to the anode of the audio output device, and the power pin and the second end are the output end of the voice unit.
Further, in the low voltage control unit, one end of a resistor R6 is connected to the first signal terminal SP1, the other end of the resistor R6 is connected to the base of a transistor Q5, the collector of the transistor Q5 is connected to the base of a transistor Q4 through a resistor R7, and the emitter of the transistor Q5 is grounded; the emitter of the triode Q4 is connected to the output end of the voltage stabilizing unit, and the collector of the triode Q4 is connected to the power supply pin of the three-pin inductor L1;
in the high-voltage control unit, one end of a resistor R26 is connected to the second signal terminal SP1, the other end of the resistor R26 is connected to the base electrode of a triode Q1, the collector electrode of the triode Q1 is connected to the base electrode of a triode Q3 through a resistor R27, and the emitter electrode of the triode Q1 is grounded; the emitter of the transistor Q3 is connected to the power supply terminal, and the collector of the transistor Q3 is connected to the power supply pin of the three-pin inductor L1.
Further, the voltage regulation unit includes a voltage regulation chip U22, the model of the voltage regulation chip U22 is HT7533, the VIN terminal of the voltage regulation chip U22 is connected to the power supply terminal, the VIN terminal is the input terminal of the voltage regulation unit 24, the VOUT terminal of the voltage regulation chip U22 is connected to the emitter of the triode Q3, the VOUT terminal is the output terminal of the voltage regulation unit, and the voltage regulation chip U22 is configured to regulate the +5V voltage of the power supply terminal to +3.3V voltage for output; the GND end of the voltage stabilizing chip U22 is grounded, a capacitor C3 is connected between the VIN end and the GND end, a capacitor C6 and a capacitor C7 are connected between the VOUT end and the GND end in parallel, and the capacitance of the capacitor C6 is smaller than that of the capacitor C7.
Further, the power supply unit includes an ac-to-dc conversion unit and a 5V voltage stabilization unit, the ac-to-dc conversion unit is configured to convert an ac power supply into a dc power supply, and the 5V voltage stabilization unit is configured to stabilize the dc power supply to +5V for supplying power to the chip.
Furthermore, the alarm control circuit also comprises a display warning unit and an analog-to-digital conversion unit, wherein the display warning unit comprises a color-changing prompting lamp, and the color-changing prompting lamp is connected with the second output end of the central control unit through a 4P terminal; the analog-to-digital conversion unit is used for receiving weight information, converting an analog force signal into a digital signal and sending the digital signal to the central control unit, and the central control unit sends out an alarm signal according to the digital signal.
The invention also provides a weighing display instrument which adopts the electronic scale alarm control circuit.
The invention also provides weighing equipment which adopts the electronic scale alarm control circuit.
According to the weighing alarm control circuit provided by the invention, the audio output device is controlled to emit different alarm sounds by arranging the audio alarm control unit between the central control unit and the audio output device, and power is supplied to each unit by connecting the power supply unit with the central control unit without externally connecting other power supplies; the central control unit can send out control signals to the sound alarm control unit, and the sound alarm control unit controls the voltage at two ends of the audio output device, so that the audio output device sends out high-pitch alarm and low-pitch alarm corresponding to different voltages. Compared with the prior art, the invention can use high-pitch alarm aiming at noisy environment, does not need to add other power supplies, has simple structure and can meet various requirements of users.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a general schematic diagram of a weigh alarm control circuit provided by the present invention;
FIG. 2 is a circuit diagram of the connection socket and the voice unit according to the present embodiment;
FIG. 3 is a circuit diagram of the high voltage control unit, the low voltage control unit and the voltage regulator unit according to the present embodiment;
FIG. 4 is a circuit diagram of the central control unit according to the present embodiment;
FIG. 5 is a circuit diagram of a power supply unit according to the present embodiment;
FIG. 6 is a circuit diagram of an analog-to-digital conversion unit according to the present embodiment;
FIG. 7 is a schematic diagram of a display warning unit according to the present embodiment;
FIG. 8 is a circuit diagram of the buzzer and the power control unit of the present embodiment;
fig. 9 is a perspective view of a weighing display instrument provided by the present invention.
Reference numerals:
10 the central control unit 20, the sound alarm control unit 21 and the seat
22 voice unit 23 high voltage control unit 24 voltage stabilizing unit
25 low voltage control unit 30 audio output device 40 power supply unit
41 AC-DC unit 425V voltage stabilizing unit 50 display warning unit
51 color-changing indicator lamp 524P terminal 60 analog-to-digital conversion unit
70 input panel
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The invention provides a weighing alarm control circuit, equipment and a display instrument.
Wherein, a weighing alarm control circuit comprises a central control unit 10, a sound alarm control unit 20, an audio output device 30 and a power supply unit 40;
a first output end of the central control unit 10 is connected with the audible alarm control unit 20, and an output end of the audible alarm control unit 30 is connected with the audio output device 30; the central control unit 10 is connected with the power supply unit 40, and the power supply unit 40 supplies power to the sound alarm control unit 20 and the audio output device 30 through the central control unit 10; the sound alarm control unit 20 controls the input voltage at two ends of the audio output device 30 through the control signal sent by the central control unit 10, and further controls the audio output device 30 to output alarm sounds with different decibels.
In specific implementation, as shown in fig. 1 to 4, a first output end of the central control unit 10 is connected to the audio alarm control unit 20, an output end of the audio alarm control unit 20 is connected to the audio output device 30, and the central control unit 10 sends a control signal to the audio alarm control unit 20 through the first output end to control the audio output device 30 to issue an alarm and an alarm mode thereof, wherein the audio alarm control unit 20 changes voltages at two ends of the audio output device 30 according to different control signals of the central control unit 20, so that the audio output device 30 issues alarms in different modes with different decibels, that is, when the voltages at two ends of the audio output device 30 are relatively high voltages, the relatively high voltage in this embodiment is +5V, and issues an alarm with a high sound (80-100 decibels); when the voltage across the audio output device 30 is relatively low, the relatively low voltage in this embodiment is +3.3V, and a bass (30-50 db) alarm is issued. In addition, the central control unit 10 is connected to the power supply unit 40, the power supply unit 40 supplies power to the central control unit 10, as shown in fig. 4, the central control unit 10 is an MCU single chip microcomputer U5, the model of the single chip microcomputer U5 is IAP15W4K61S4-30I, in this embodiment, the 7 th pin V + terminal of the single chip microcomputer U5 is used as a power supply pin to supply power to other units, wherein the V + terminal is also used as a part of the first output terminal, that is, the power supply unit 40 supplies power to the sound alarm control unit 20 and the audio output device 30 through the central control unit.
The invention controls the voltage at two ends of the audio output unit 30 through the sound alarm control unit 20, so that the audio output unit 30 can give out alarms in two modes of high-pitch alarm and low-pitch alarm, when the audio output unit is in a noisy environment, the low-pitch alarm mode can not provide effective alarm prompt, the audio output unit can be set into the high-pitch alarm mode through the input panel 70, keys or a mode change-over switch, and when the alarm condition is met, the audio output unit can give out effective alarm prompt in high decibel.
Specifically, as shown in fig. 1, the sound alarm control unit 20 includes a connection base 21, a voice unit 22, a high voltage control unit 23, a voltage stabilizing unit 24, and a low voltage control unit 25; the connection socket 21 shown in fig. 3 is a four-pin socket with the model number DIS11, and includes a first signal terminal SP1, a second signal terminal SP2, a power supply terminal and a ground terminal, the connection socket 21 is connected to the 6 th pin SP2 terminal, the 7 th pin V + terminal and the 29 th pin OUTBEEP/SP1 terminal of the single chip microcomputer U5 through the first output terminal of the central control unit 10, i.e., the DIS6 interface shown in fig. 4, and the central control unit 10 sends a control signal to the audio alarm control unit 20 through the connection socket 21 and supplies power. As shown in fig. 2, the voice unit 22 is provided with a voice chip U21 of type LC9801R, the VCC terminal of the voice chip U21, that is, the input terminal of the voice unit 22, is connected to the +5V power supply terminal of the connection base 21 through a resistor R2, the OUT terminal of the voice chip U21 is connected to the base of a transistor Q2 through a resistor R3, the emitter ground of the transistor Q2, the collector of the transistor Q2 is connected to the first terminal of a three-pin inductor L1, the second terminal of the three-pin inductor L1 is connected to the cathode of the audio output device 30, the power pin of the three-pin inductor L1 is connected to the anode of the audio output device 30, wherein the power pin of the three-pin inductor L1 and the second terminal are the output terminal of the voice; preferably, the three-pin inductor L1 is 1.5MH-130MH in specification, and is used for amplifying and outputting the audio signal output by the voice chip U21.
In addition, as shown in fig. 3, in the high voltage control unit 23, one end of a resistor R26 is connected to the second signal terminal SP1, the other end of a resistor R26 is connected to the base of a transistor Q1, the collector of the transistor Q1 is connected to the base of a transistor Q3 through a resistor R27, and the emitter of the transistor Q1 is grounded; the emitter of the transistor Q3 is connected to the +5V supply terminal, and the collector of the transistor Q3 is connected to the supply pin of the three-pin inductor L1. In the low-voltage control unit 25, one end of a resistor R6 is connected to a first signal terminal SP1, the other end of a resistor R6 is connected to a base of a transistor Q5, a collector of the transistor Q5 is connected to a base of a third transistor Q4 through a second resistor R7, and an emitter of the transistor Q5 is grounded; an emitter electrode of the triode Q4 is connected to the output end of the voltage stabilizing unit 24, and a collector electrode of the triode Q4 is connected to a power supply pin of the three-pin inductor L1; in the voltage stabilizing unit 24, the model of the voltage stabilizing chip U22 is HT7533, the VIN end of the voltage stabilizing chip U22 is connected to the power supply end, the VIN end is the input end of the voltage stabilizing unit 24, the VOUT end of the voltage stabilizing chip U22 is connected to the emitter of the triode Q3, the VOUT end is the output end of the voltage stabilizing unit 24, and the voltage stabilizing chip U22 is used for stabilizing the +5V voltage of the power supply end to +3.3V voltage for output; the triode Q1 and the triode Q5 are NPN type triodes, and the triode Q3 and the triode Q4 are PNP type triodes; the GND end of the voltage stabilization chip U22 is grounded, a first capacitor C1 is connected between the VIN end and the GND end, a capacitor C6 and a capacitor C7 are connected between the VOUT end and the GND end in parallel, and the capacitance of the capacitor C6 is smaller than that of the capacitor C7.
The invention sends a control signal to the sound alarm control unit 20 through the central control unit 10, when in a quieter environment, a bass alarm mode is selected, the central control unit 10 sends a high level signal to the first signal end SP1 to control the low voltage control unit to work, the first signal end SP1 is at a high potential, namely the base of the NPN triode Q5 is at a high potential, the triode Q5 is conducted, the collector potential of the triode Q5 is pulled low, namely the base of the PNP triode Q4 is at a low potential, the PNP triode Q4 is conducted, therefore, the +3.3V voltage output by the voltage stabilizing unit 24 is connected to the power supply pin of the three-pin inductor L1, when the central control unit 10 sends an alarm signal to the power supply end, the voice chip U21 is electrified, the OUT end outputs an audio signal to trigger the NPN triode Q1 to be conducted, the audio signal is amplified through the three-pin inductor L1, the power supply pin voltage of the three-pin inductor L1 is +, the audio output device 30 therefore sounds a bass alert of 30-50 db. The working principle of the high voltage control unit 23 is the same as that of the low voltage control unit 25, and the detailed description thereof is omitted here.
Preferably, the power supply unit 40 is provided with an ac-to-dc converting unit 41 and a 5V voltage stabilizing unit 42, as shown in fig. 5, fig. 5 includes a circuit diagram of the ac-to-dc converting unit 41 and the 5V voltage stabilizing unit 42, in this embodiment, a power supply of ac 12V is converted into dc 12V through the ac-to-dc converting unit 41, and then is stabilized by the 5V voltage stabilizing unit 42 to output a stable 5V voltage to be supplied to each chip; preferably, 5V regulated power supply 42 may output +5VA power supply, +5VA for supplying analog power supply, +5VD for supplying digital power supply, and +5 VD.
Preferably, as shown in fig. 6 and 7, the weighing alarm control circuit provided by the invention further comprises a display warning unit 50 and an analog-to-digital conversion unit 60. The analog-to-digital conversion unit 60 is in wired or wireless communication connection with the weighing sensor, the analog-to-digital conversion unit 60 uses the +5VA analog power supply, and the analog-to-digital conversion unit 60 converts an analog force signal into a digital signal after receiving weight information through the A/D chip U3 with the model of XM24+, and sends the digital signal to the single chip microcomputer U5 for data processing. The display warning unit 50 comprises a color-changing indicator light 51 and a 4P terminal 52, the color-changing indicator light 51 is connected to a second output end of the central control unit 10 through the 4P terminal 52, the second output end comprises 30 th-32 th pins of the single chip microcomputer U5, and each wiring pin corresponds to an output signal of one middle color. The color-changing indicator light 51 comprises a backlight piece, a light guide plate, a diffusion piece, a reflection piece and an LED lamp, and the backlight piece is arranged in a groove of the scale shell by the color-changing indicator light 51 in an embedding mode, so that the color-changing indicator light and the scale shell are integrated. The LED lamp guides the light source into the whole backlight sheet through the light guide sheet, and the brightness of the LED lamp is uniform by utilizing the diffusion sheet. The bottom is provided with a reflector plate to prevent the light source from leaking and reflect the light source, so that the light source can be intensively projected in the front. Wherein the 4P terminal 52 connects the color-changing indicator lamp 51 to the main board CON8 seat for signal communication, as shown in fig. 7, in this embodiment, the 4P terminal R-is a red LED lamp cathode, G-is a green LED lamp cathode, Y-is a yellow LED lamp cathode, a + is an LED lamp common terminal anode, and the anode supplies power for 5V normally, so that the LED lamp cathode and the power cathode are connected to form a complete power loop, thereby lighting the LED lamp and playing a warning effect.
Preferably, the present embodiment is further provided with a buzzer and a power supply control unit, and the circuit diagram of the buzzer and the power supply control unit is shown in fig. 8; the buzzer is used for internal warning, and the power supply control unit is used for switching the power supply of the wired power supply and the power supply of the battery.
In actual use, the upper limit value and the lower limit value of the weight range can be set through the input panel 70, a high-pitch alarm mode or a low-pitch alarm mode can be set according to the use environment, when the high-pitch alarm mode is set, the 29 th pin OUTBEEP/SP1 end of the single chip microcomputer U5 outputs a high-level signal, and when the low-pitch alarm mode is set, the 6 th pin SP2 end of the single chip microcomputer U5 outputs a high-level signal. After the single chip microcomputer U5 processes and calculates the digital signal from the analog-to-digital conversion unit 60, when the weight value is greater than the upper limit value, the pin 32 of the single chip microcomputer U5 outputs a low level signal through the CON8 seat to drive the built-in color-changing indicator lamp 51 to light the red light, so that the prompt effect of lighting the red light when the weight upper limit value is exceeded can be achieved; meanwhile, the singlechip U5 can send an alarm signal to the voice chip U21 to warn articles exceeding the upper limit of weight. When the weight value is smaller than the lower limit value, a pin 31 of the single chip microcomputer U5 outputs a low level signal through a CON8 seat to drive the built-in color-changing indicator lamp 51 to light the yellow lamp, so that the effect of indicating that the yellow lamp is turned on when the weight value is lower than the lower limit value can be achieved; meanwhile, the singlechip U5 can send an alarm signal to the voice chip U21 to warn articles below the lower weight limit. When the weight value is within the preset weight range, a low level signal is output by a pin 30 of the single chip microcomputer U5 through the CON8 seat, the built-in color-changing indicator lamp 51 is driven to light the green lamp, and the effect of prompting that the green lamp is lit when the weight value is in a qualified value can be achieved.
The invention also provides a weighing display instrument which adopts the electronic scale alarm control circuit. As shown in fig. 9, the weighing display instrument includes a housing, which can be divided into an upper housing and a lower housing, and the two housings are connected by one of, but not limited to, a screw connection or a snap connection; the top of the upper shell is provided with a display screen, and the display screen adopts but is not limited to a digital display type weighing display and is used for receiving signals collected by the sensor and displaying a weight value; the weighing alarm control circuit is electrically connected below the display screen; the position that is in display screen one side on the epitheca is equipped with the trompil, and the trompil is embedded to be equipped with discolour warning light 51 and shows different colours according to the weight scope of difference to do the suggestion. An input panel 70 is also provided at the top of the upper housing for setting upper and lower weight limits and alarm modes.
According to the electronic scale instrument with the built-in alarm device, the prompt lamp is arranged beside the color-changing display screen on the shell, and the built-in alarm horn is structurally arranged, so that the structure of the electronic scale instrument is more simplified under the condition that the prompt effect of the prompt lamp is not influenced; the alarm horn and the color-changing prompt lamp are electrically connected with the display screen, so that the LED display screen is only connected with one power supply, the structure is simplified, and the production cost is reduced. Compared with the external hanging structure of the alarm lamp in the existing electronic scale, the electronic scale has the advantages of simple structure, stronger adaptability and convenient use.
The invention also provides weighing equipment which adopts the electronic scale alarm control circuit.
According to the weighing alarm control circuit provided by the invention, the audio output device is controlled to emit different alarm sounds by arranging the audio alarm control unit between the central control unit and the audio output device, and power is supplied to each unit by connecting the power supply unit with the central control unit without externally connecting other power supplies; the central control unit can send out control signals to the sound alarm control unit, and the sound alarm control unit controls the voltage at two ends of the audio output device, so that the audio output device sends out high-pitch alarm and low-pitch alarm corresponding to different voltages. Compared with the prior art, the invention can use high-pitch alarm aiming at noisy environment, does not need to add other power supplies, has simple structure and can meet various requirements of users.
Although terms such as a central control unit, an audible alarm control unit, a connection base, a high voltage control unit, a low voltage control unit, a voice unit, a voltage stabilizing unit, an audio output device, a power supply unit, a display alarm unit, a default conversion unit, and an input panel are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a weighing alarm control circuit which characterized in that: comprises a central control unit (10), a sound alarm control unit (20), an audio output device (30) and a power supply unit (40);
the first output end of the central control unit (10) is connected with the sound alarm control unit (20), and the output end of the sound alarm control unit (20) is connected with the audio output device (30); the central control unit (10) is connected with the power supply unit (40), and the power supply unit (40) supplies power to the sound alarm control unit (20) and the audio output device (30) through the central control unit (10); the sound alarm control unit (20) controls the input voltage at two ends of the audio output device (30) through a control signal sent by the central control unit (10), and further controls the audio output device (30) to output alarm sounds with different decibels.
2. The weighing alarm control circuit of claim 1, wherein: the sound alarm control unit (20) comprises a connecting seat (21) and a voice unit (22), and the central control unit (10) sends a control signal to the sound alarm control unit (20) through the connecting seat (21) and supplies power; the input end of the voice unit (22) is connected with the power supply end, the output end of the voice unit (22) is connected with the audio output device (30), and the voice unit (22) is used for sending an alarm audio signal to the audio output device (30).
3. The weighing alarm control circuit of claim 2, wherein: the sound alarm control unit (20) further comprises a high-voltage control unit (23), a voltage stabilizing unit (24) and a low-voltage control unit (25), and the connecting seat (21) is provided with a first signal end SP1, a second signal end SP2, a power supply end and a grounding end; the low-voltage control unit (25) is respectively connected with the first signal terminal SP1, the output terminal of the voltage stabilizing unit (24) and the output terminal of the voice unit (22), the input terminal of the voltage stabilizing unit (24) is connected with the power supply terminal, and the voltage stabilizing unit (24) is used for stabilizing the voltage of the input terminal and outputting a voltage lower than the voltage of the input terminal; the high voltage control unit (23) is respectively connected with the second signal terminal SP2, the power supply terminal and the output terminal of the voice unit (22).
4. The weighing alarm control circuit of claim 3, wherein: the voice unit (22) comprises a voice chip U21, the model of the voice chip U21 is LC9801R, the VCC end of the voice chip U21 is connected with the power supply end, and the voltage of the power supply end is + 5V; the OUT end of the voice chip U21 is connected to the base of a first triode Q2, the OUT end is used for outputting an audio signal, the emitting electrode of the triode Q2 is grounded, the collecting electrode of the triode Q2 is connected to the first end of a three-pin inductor L1, the second end of the three-pin inductor L1 is connected to the cathode of the audio output device (30), the power pin of the three-pin inductor L1 is connected to the anode of the audio output device (30), and the power pin and the second end are the output end of the voice unit (22).
5. The weighing alarm control circuit of claim 4, wherein: in the low-voltage control unit (25), one end of a resistor R6 is connected to the first signal terminal SP1, the other end of the resistor R6 is connected to the base electrode of a triode Q5, the collector electrode of the triode Q5 is connected to the base electrode of a triode Q4 through a resistor R7, and the emitter electrode of the triode Q5 is grounded; the emitter of the triode Q4 is connected to the output end of the voltage stabilizing unit (24), and the collector of the triode Q4 is connected to the power supply pin of the three-pin inductor L1;
in the high-voltage control unit (23), one end of a resistor R26 is connected to the second signal terminal SP1, the other end of the resistor R26 is connected to the base electrode of a triode Q1, the collector electrode of the triode Q1 is connected to the base electrode of a triode Q3 through a resistor R27, and the emitter electrode of the triode Q1 is grounded; the emitter of the transistor Q3 is connected to the power supply terminal, and the collector of the transistor Q3 is connected to the power supply pin of the three-pin inductor L1.
6. The weighing alarm control circuit of claim 5, wherein: the voltage stabilizing unit (24) comprises a voltage stabilizing chip U22, the model of the voltage stabilizing chip U22 is HT7533, the VIN end of the voltage stabilizing chip U22 is connected to the power supply end, the VIN end is the input end of the voltage stabilizing unit (24), the VOUT end of the voltage stabilizing chip U22 is connected to the emitter of the triode Q3, the VOUT end is the output end of the voltage stabilizing unit (24), and the voltage stabilizing chip U22 is used for stabilizing the +5V voltage of the power supply end into +3.3V voltage for output; the GND end of the voltage-stabilizing chip U22 is grounded, a capacitor C3 is connected between the VIN end and the GND end, a capacitor C6 and a capacitor C7 are connected between the VOUT end and the GND end in parallel, and the capacitance of the capacitor C6 is smaller than that of the capacitor C7.
7. The weighing alarm control circuit of claim 1, wherein: the power supply unit (40) comprises an alternating current-to-direct current unit (41) and a 5V voltage stabilizing unit (42), wherein the alternating current-to-direct current unit (41) is used for converting an alternating current power supply into a direct current power supply, and the 5V voltage stabilizing unit (42) is used for stabilizing the direct current power supply to +5V to supply power to the chip.
8. The weighing alarm control circuit of claim 1, wherein: the alarm control circuit further comprises a display warning unit (50) and an analog-to-digital conversion unit (60), wherein the display warning unit (50) comprises a color-changing prompting lamp (51), and the color-changing prompting lamp (51) is connected with a second output end of the central control unit (10) through a 4P terminal (52); the analog-to-digital conversion unit (60) is used for receiving weight information, converting an analog force signal into a digital signal and sending the digital signal to the central control unit (10), and the central control unit (10) sends out an alarm signal according to the digital signal.
9. A weighing display instrument is characterized in that: an electronic scale alarm control circuit according to any one of claims 1 to 8 is used.
10. A weighing apparatus characterized by: an electronic scale alarm control circuit according to any one of claims 1 to 8 is used.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2731463Y (en) * | 2004-10-27 | 2005-10-05 | 北京鸿都伟业科技发展有限公司 | Intelligent electricity leakage alarm for train |
| CN201438327U (en) * | 2009-04-04 | 2010-04-14 | 广州中沙桥汽车用品有限公司 | Anti-theft alarm device |
| US7868743B1 (en) * | 2007-03-23 | 2011-01-11 | Chester Brown | Alarm termination floor apparatus |
| CN201751916U (en) * | 2010-05-20 | 2011-02-23 | 海湾消防网络有限公司 | Voice-digital networking alarm |
| CN106056845A (en) * | 2016-07-21 | 2016-10-26 | 国网辽宁省电力有限公司丹东供电公司 | Anti-false alarm device |
| CN207164971U (en) * | 2017-08-30 | 2018-03-30 | 河南众恒工业炉工程技术有限公司 | A kind of Intelligent voice alarm |
| WO2018133155A1 (en) * | 2017-01-22 | 2018-07-26 | 深圳市华星光电技术有限公司 | Audio output circuit, and audio apparatus |
| CN207851564U (en) * | 2018-01-31 | 2018-09-11 | 莆田市城厢区易易联电子设备有限公司 | A kind of sound and light alarm circuit |
| CN209264100U (en) * | 2018-12-26 | 2019-08-16 | 中国水电建设集团十五工程局有限公司 | Discharging platform weighing display and acoustic-optic alarm |
| CN210199942U (en) * | 2019-07-18 | 2020-03-27 | 泉州市联辉电子科技有限公司 | Intelligent alarm gateway |
-
2020
- 2020-12-23 CN CN202011536435.XA patent/CN112763036B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2731463Y (en) * | 2004-10-27 | 2005-10-05 | 北京鸿都伟业科技发展有限公司 | Intelligent electricity leakage alarm for train |
| US7868743B1 (en) * | 2007-03-23 | 2011-01-11 | Chester Brown | Alarm termination floor apparatus |
| CN201438327U (en) * | 2009-04-04 | 2010-04-14 | 广州中沙桥汽车用品有限公司 | Anti-theft alarm device |
| CN201751916U (en) * | 2010-05-20 | 2011-02-23 | 海湾消防网络有限公司 | Voice-digital networking alarm |
| CN106056845A (en) * | 2016-07-21 | 2016-10-26 | 国网辽宁省电力有限公司丹东供电公司 | Anti-false alarm device |
| WO2018133155A1 (en) * | 2017-01-22 | 2018-07-26 | 深圳市华星光电技术有限公司 | Audio output circuit, and audio apparatus |
| CN207164971U (en) * | 2017-08-30 | 2018-03-30 | 河南众恒工业炉工程技术有限公司 | A kind of Intelligent voice alarm |
| CN207851564U (en) * | 2018-01-31 | 2018-09-11 | 莆田市城厢区易易联电子设备有限公司 | A kind of sound and light alarm circuit |
| CN209264100U (en) * | 2018-12-26 | 2019-08-16 | 中国水电建设集团十五工程局有限公司 | Discharging platform weighing display and acoustic-optic alarm |
| CN210199942U (en) * | 2019-07-18 | 2020-03-27 | 泉州市联辉电子科技有限公司 | Intelligent alarm gateway |
Non-Patent Citations (1)
| Title |
|---|
| 袁晓芳 等: "机场停机坪哨位智能报警系统设计与实现", 《国外电子测量技术》 * |
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