CN103424170B - There is the digital self-indicating scale of anti-cheating function - Google Patents
There is the digital self-indicating scale of anti-cheating function Download PDFInfo
- Publication number
- CN103424170B CN103424170B CN201310343178.1A CN201310343178A CN103424170B CN 103424170 B CN103424170 B CN 103424170B CN 201310343178 A CN201310343178 A CN 201310343178A CN 103424170 B CN103424170 B CN 103424170B
- Authority
- CN
- China
- Prior art keywords
- pin
- chip microcomputer
- chip
- signal
- connects
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Circuits Of Receivers In General (AREA)
- Power Sources (AREA)
Abstract
The invention discloses a kind of digital self-indicating scale with anti-cheating function, this digital self-indicating scale is made up of the external LOAD CELLS of circuit module, 5*5 keyboard, display, hummer, 5.5V ~ 9.6V direct supply; The present invention gathers LOAD CELLS voltage signal and weight display data signal of weighing, compare with the data standard of internal memory, No. ID to weight, unit price, the amount of money, time cheating information and digital self-indicating scale is recorded, preserves, and wireless transmission is carried out to cheating information, realize long-range and digital management, improve the management level to digital self-indicating scale.
Description
Technical field
The present invention relates to digital self-indicating scale, be specifically related to that a kind of signal produced LOAD CELLS amplifies, A/D conversion, keyboard interface, data output interface, to the monitoring of weighing-up wave, weighing information is analyzed to practising fraud, record, and the digital self-indicating scale of Wireless Data Transmission can be carried out.
Background technology
At present, numeral self-indicating scale has become one of modal trade settlement measurement instrument, on market, digital self-indicating scale metering is whether accurate, closely bound up with the daily life of common people, but many illegal retailers always run counter to the principle of honest operation, utilize conventional digital self-indicating scale not have the defect of anti-cheating function, use various fraudulent means, seek illegal profit.Common digital self-indicating scale cheat method mainly contains:
1, display captions are hidden: general digital self-indicating scale has weight, unit price and price three display windows, some retailers, deliberately with the commodity that stand is stacked, by just covering the display window of client one side, make client not see price, take advantage of client not note, input high unit price and carry out cheat customers; In order to prevent this cheat method, after client can only carefully see the display of three display windows clearly, then settle accounts.
2, impact the power of borrowing to weigh: retailer throws in the scale pan by heavy for commodity, due to impulsive force, artificial amplified display weight moment, etc. do not settle out, client also unsighted display time, just commodity are picked up, offering price; Prevent this cheat method, client can only require that retailer handles with care, puts surely and claims.
3, do not allowance for bark and weigh: when buying commodity, digital self-indicating scale is not allowanced for bark operation by some retailer, utilizes client to neglect, is weighed by commodity together with the scale pan; Prevent this cheat method, client after taking off commodity, can only watch the weight display of digital self-indicating scale.
4, technology cheating method:
(1) cheating switch is installed: operator installs a cheating switch additional bottom digital self-indicating scale, opens cheating switch and just become scale of giving short weight; Close cheating switch, weighing data just becomes normal;
(2) password is set: as long as operator presses the numeral (password) of several prior setting on numeric keypad, digital self-indicating scale just can be made to realize normally weighing or giving short weight weighing;
(3) installing remote device: by wireless remote control, makes weighing not increase emptily 10%, 20%, 30% not etc.;
(4) chip is changed: utilize technological means to change the electronic chip of digital self-indicating scale inside, make the weight ratio actual weight weight weighed up.
Technology is practised fraud because disguise is strong, easy to operate, and evidence obtaining difficulty is the main cheat method of existing digital self-indicating scale.
In order to effectively prevent the cheating of illegal operators, the management method that quality supervision department now adopts mainly contains:
1, link with the relevant departments such as industrial and commercial, implementation associating strike;
2, provide right-safeguarding counterweight, allow supervision of the masses;
3, utilize instruments such as " anti-digital self-indicating scale remote control cheating devices ", prevent digital self-indicating scale remote control from practising fraud;
4, strengthen digital self-indicating scale maintenance link management, in order to prevent privately reequiping digital self-indicating scale, quality supervision department's regulation numeral self-indicating scale must post sealing of quality supervision department, and is having the maintenace point maintenance of maintenance licence;
5, strengthen digital self-indicating scale calibrating and supervision and management;
6, the career moral quality education to practitioner is strengthened, their service behavior of specification;
7, strengthen inspection, improve punishment.
Although administrative authority at different levels adopts multiple counter-measure, but because traditional digital self-indicating scale does not have load cell signal analytic function, systematic digitizing and remote wireless management function is not had, minority illegal operators, in order to seek wrongful interests yet, always on digital self-indicating scale, adopt fraudulent means, administrative authority can not Timeliness coverage, even if there is people to report, owing to not having evidence, or evidence obtaining difficulty, also effectively cannot punish illegal operators.Therefore the phenomenon utilizing conventional digital self-indicating scale to carry out technology cheating remains incessant after repeated prohibition, and how effectively to prevent the technology of digital self-indicating scale from practising fraud, improves the management level of digital self-indicating scale, just become very urgent.
Summary of the invention
The object of the invention is to: a kind of digital self-indicating scale with anti-cheating function is provided, load cell signal is gathered and analyzes, solve conventional digital self-indicating scale to weigh the problem that the cheating information such as number of times, weight, unit price, the amount of money, time record, preserve to cheating, make digital self-indicating scale have the function of preventing techniques cheating; In addition, wireless transmission is carried out to the real-time information of digital self-indicating scale, solve conventional digital self-indicating scale and can not realize the problem of exchanges data with the external world, realize long-range and function that is digital management.
The technology used in the present invention solution is: the signal processing circuit (the filter amplification circuit A1 of LOAD CELLS, A/D change-over circuit, digital filter circuit, single-chip microcomputer signal processing circuit) of digital self-indicating scale, battery voltage supervisory circuit, weighing-up wave supervision and analysis circuit, date-time circuit for generating, data wireless transmission circuit are made a circuit module, the external LOAD CELLS of this circuit module, 5*5 keyboard, display, hummer, 5.5V ~ 9.6V direct supply, form the digital self-indicating scale with anti-cheating function.
The circuit of the circuit module of above-mentioned digital self-indicating scale connects as follows:
(A1) be signal filtering amplifying circuit, enlargement factor is 128dB, external LOAD CELLS, the voltage signal of input LOAD CELLS, and the signal after amplification exports (A/D) D/A converting circuit to;
(A/D) be D/A converting circuit, simulating signal is converted into digital signal, send (CPU1, CPU2) single-chip microcomputer process and analysis;
(CPU1) be single chip circuit, external 5*5 keyboard, hummer and display, input through keyboard instructions such as receiving unit price, reset, allowance for bark, return, and export unit price, weight, unit, amount of money display data by serial mode, send verbal cue signal by hummer;
(CPU2) be single chip circuit, gather the weight display exported from the output weight signal of A/D D/A converting circuit and CPU1, external wireless sending module (RF);
(RF) be wireless transceiver circuit, frequency of operation is 2.4GHz, the wireless cheating information data sending (CPU2) and transmit, the supervisory instruction that receiving management system sends;
Date circuit produce year, month, day, hour, min, second signal, meet CPU1, when there is cheating, date-time information is transferred to (CPU2) through (CPU1), (CPU1) and between (CPU2) adopting serial mode communication, there is the date and time of cheating in record;
Power supply 1 is primary power, is input as 5.5 ~ 9.6V DC voltage, for circuit each in module provides direct-current working volts, exports as+3.3V DC voltage, for external circuit provides+3.3V direct-current working volts;
Power supply 2 is LOAD CELLS power source special, external LOAD CELLS power end;
A2 is battery voltage detection circuit, and input LOAD CELLS operating voltage, the voltage of output is connected to (A/D) D/A converting circuit.
The circuit module packing forms of above-mentioned digital self-indicating scale is dual-in-line, and amount to 24 pins, pin 1 ~ 12 is I/O1, and pin 13 ~ 24 is I/O2, I/O1, I/O2 the 1st pin is DC power anode incoming end, for circuit module provides DC supply, external direct current power supply+5V holds, and inside connects chip U3 (HX711) the 16th pin, triode VT (8050) emitter, integrated three-terminal regulator block IC (LM1117) the 1st pin (Vin input end) and single-chip microcomputer U2 (EM78P153) the 5th pin, 2nd pin is unsettled, 3rd pin is LOAD CELLS DC power supply cathode output end, export+2.5V DC voltage, LOAD CELLS and A/D change-over circuit share a power supply, external LOAD CELLS power positive end, inside connects triode VT (8050) collector and chip U3 (HX711) the 3rd pin (A/D change-over circuit power input), 4th pin, the 5th pin are respectively the positive and negative signal input part of LOAD CELLS, the voltage range of input is 0 ~ 20mV, 4th pin external LOAD CELLS positive signal output terminal, inside connect chip U3 (HX711) the 8th pin (A channel positive input terminal), 5th pin external LOAD CELLS negative signal output terminal, inside connects chip U3 (HX711) the 7th pin (A channel negative input end), 6th pin is unsettled, 7th pin, the 8th pin are battery voltage detection signal positive-negative input end, input voltage range is 0 ~ 40mV, 7th pin external connection battery voltage detection signal positive pole, inside connect chip U3 (HX711) the 10th pin (channel B positive input terminal), 8th pin external connection battery voltage detection signal negative pole, inside connects chip U3 (HX711) the 9th pin (channel B negative input end), 9th pin is the clock signal output terminal of display data Serial output, clocking, and external display driver circuit clock signal input terminal, inside connects single-chip microcomputer U1 (PIC16LF873) the 3rd pin, 10th pin is the data output end of display data Serial output, the display data of the weight after output processing, unit price, the amount of money, temporal information, and external display driver circuit serial data input, inside connects single-chip microcomputer U1 (PIC16LF873) the 4th pin, 11st pin is audio signal output terminal, output language cue, external buzzer, inside connects single-chip microcomputer U1 (PIC16LF873) the 2nd pin, 12nd pin, 13rd pin is earth terminal, make circuit potential reference point, the negative pole of external power supply, interior connecting resistance R2 lower end, electric capacity C1 negative pole, electric capacity C2 negative pole, electric capacity C3 negative pole, electric capacity C4 negative pole, single-chip microcomputer U1 (PIC16LF873) the 8th pin (VSS), single-chip microcomputer U1 (PIC16LF873) the 19th pin (VSS), single-chip microcomputer U2 (EM78P153) the 11st pin (VSS), chip U3 (HX711) the 5th pin (AGND), chip U3 (HX711) the 14th pin (XI), chip U3 (HX711) the 15th pin (RATE), clock chip U4 (DS1302) the 4th pin (GND), radio receiving transmitting module RF (JF24D) the 10th pin (GND), 14th pin is+3.3V output end of stabilized voltage supply, for external circuit provides+3.3V power supply, inside connects integrated three-terminal regulator block IC (LM1117) the 3rd pin (output terminal), 15th, 16,17,18,19,20,21,22,23,24 pin totally 10 pins, form 5*5 keyboard signal input end, 15th, 16,17,18,19 pin are the capable signal input part of keyboard, inside connect single-chip microcomputer U1 (PIC16LF873) corresponding the 11st, 12,13,14,15 pin, 20th, 21,22,23,24 pin are keyboard column signal input end, inside connect single-chip microcomputer U1 (PIC16LF873) corresponding the 16th, 17,18,21,22 pin.
Triode VT (8050) and resistance R1, resistance R2, electric capacity C1 form series type direct current regulation source, for external LOAD CELLS provides direct-current working volts; Resistance R1, resistance R2 are sample resistance, determine the size of output voltage; Electric capacity C1 is voltage output filter capacitor; Triode VT (8050) is power adjustment pipe, emitter connects the 1st pin of I/O1, for the input pin of external power supply, base stage connects chip U3 (HX711) the 2nd pin, 3rd pin of collector connecting resistance R1 upper end, electric capacity C1 positive pole, chip U3 (HX711) the 3rd pin, I/O1, for stabilized voltage supply output pin, export DC voltage+2.5V.
Integrated three-terminal regulator block IC (LM1117) and electric capacity C3, electric capacity C4 form an integrated DC stabilized voltage supply, for single-chip microcomputer U1 (PIC16LF873), clock chip U4 (DS1302) and radio receiving transmitting module RF (JF24D) circuit provide+3.3V DC voltage, integrated three-terminal regulator block IC (LM1117): the 1st pin (Vin) connects the 1st pin of I/O1; 2nd pin (GND) is earth terminal, connects the 12nd pin of I/O1; 3rd pin (Vout) is regulator block output terminal, export+3.3V DC voltage, connect single-chip microcomputer U1 (PIC16LF873) the 1st pin (MCLR/VPP), single-chip microcomputer U1 (PIC16LF873) the 20th pin (VDD), clock chip U4 (DS1302) the 8th pin (VCC1), radio receiving transmitting module RF (JF24D) the 1st pin (VCC), I/O2 the 14th pin (+3.3V); Electric capacity C3, electric capacity C4 are power filtering capacitor, electric capacity C3 positive pole connects integrated three-terminal regulator block IC (LM1117) the 1st pin, electric capacity C3 minus earth, electric capacity C4 positive pole connects integrated three-terminal regulator block IC (LM1117) the 3rd pin, electric capacity C4 minus earth.
Chip U3 (HX711): the 1st pin (VSUP) is digital power input end; 16th pin (DVDD) is chip U3 (HX711) interior voltage-stabilized power supply input end, is connected with external power positive pole by I/O1 the 1st pin; 2nd pin (BASE) is chip U3 (HX711) interior voltage-stabilized power supply control output end, connects the base stage of triode VT (8050); 3rd pin (AVDD) is chip U3 (HX711) inner A/D analog power input end, connect the collector of triode VT (8050), be connected with LOAD CELLS by I/O1 the 3rd pin, make A/D change-over circuit and LOAD CELLS use same power supply; 4th pin (VFB) is chip U3 (HX711) interior voltage-stabilized power supply control input end, connecting resistance R1 lower end, resistance R2 upper end; 5th pin (AGND) is simulating signal earth terminal, ground connection; 6th pin (VBG) is reference voltage output terminal, connects with electric capacity C2 positive pole, and electric capacity C2 is power filtering capacitor, electric capacity C2 minus earth; 7th pin (INA-), the 8th pin (INA+) be respectively A channel differential signal-,+input end, by I/O1 the 4th pin and the 3rd pin connect LOAD CELLS export voltage signal; 9th pin (INB-), the 10th pin (INB+) be respectively channel B differential signal-,+input end, by I/O1 the 7th pin and the 6th pin connect battery voltage detection circuit export voltage signal; 11st pin (PD_SCK), the 12nd pin (D_OUT) composition data Serial output, numerical data of weighing in chip U3 (HX711) is sent in single-chip microcomputer U1 (PIC16LF873), 11st pin (PD_SCK) is clock line, connect single-chip microcomputer U1 (PIC16LF873) the 6th pin, 12nd pin (D_OUT) is data line, Serial output is weighed digital signal, connects single-chip microcomputer U1 (PIC16LF873) the 7th pin; 13rd pin (XO), the 14th pin (XI) are external crystal-controlled oscillation incoming end, and chip U3 (HX711) internal clocking oscillatory circuit need not external crystal oscillator, and the 13rd pin is unsettled, the 14th pin (XI) ground connection; 15th pin (RATE) is output data rate control input end, and message transmission rate is 10Hz, ground connection.
Single-chip microcomputer U1 (PIC16LF873): the 1st pin, the 20th pin meet direct supply+3.3V and hold, 2nd pin makes output pin, exports voice signal, by I/O1 the 11st pin external buzzer, 3rd pin and the 4th pin make output pin, and serial ports exports weighing information display data, and the 3rd pin output clock synchronizing signal, connects I/O1 the 9th pin, and the 4th pin serial output data signal connects I/O1 the 10th pin, by I/O1 the 9th pin, the 10th pin, and external display driver circuit, 5th pin is unsettled, 6th pin and the 7th pin make input pin, the digital signal of weighing that receiving chip U3 (HX711) exports, 6th pin is digital signal serial input terminal of weighing, connect chip U3 (HX711) the 12nd pin, 7th pin is serial synchronization clock input end, connects chip U3 (HX711) the 11st pin, 8th pin (VSS) and the 19th pin (VSS) ground connection, 9th pin (OSC1) and the 10th pin (OSC2) are external crystal-controlled oscillation incoming end, internal oscillator (4MHz), the 9th pin (OSC1) and the 10th pin (OSC2) unsettled, 11st, 12,13,14,15,16,17,18,21,22 pin make input pin, respectively with I/O2 the 15th, 16,17,18,19,20,21,22,23,24 pin connect, 11st, 12,13,14,15 pin are keyboard column signal input end, 16th, 17,18,21,22 pin are the capable signal input part of keyboard, external 5*5 keyboard, receives keyboard input signal, 23rd, 25, 26 pin meet clock chip U4 (DS1302) the 7th respectively, 6, 5 pin, form bidirectional linked list communication between single-chip microcomputer U1 (PIC16LF873) and clock chip U4 (DS1302), 23rd pin is synchronizing clock signals output terminal, 25th pin is bidirectional data transfers end, 26th pin is Enable Pin, when the 26th pin (RB5=1) is for high level, the date that receive clock chip U4 (DS1302) produces, time data, when the 26th pin (RB5=0) is for low level, to U4 (DS1302) initialization of clock chip U4 (DS1302) tranmitting data register chip, date, the data of time adjustment, 24th pin is unsettled, 27th, 28 pin connect single-chip microcomputer U2 (EM78P153) the 14th pin and the 11st pin respectively, form the both-way communication between single-chip microcomputer U1 (PIC16LF873) and single-chip microcomputer U2 (EM78P153), 27th pin is synchronizing clock signals line, 28th pin is bidirectional data transfers line, data between single-chip microcomputer U1 (PIC16LF873) and single-chip microcomputer U2 (EM78P153) are received, send out and control by single-chip microcomputer U2 (EM78P153), when the 27th pin (RB6=0) is for electronegative potential, when 28th pin (RB7=1) is for noble potential, receive the supervisory instruction that single-chip microcomputer U2 (EM78P153) forwards, when 27th pin (RB6=1) is for noble potential, when 28th pin (RB7=0) is for electronegative potential, send cheating weighing information.
Single-chip microcomputer U2 (EM78P153): the 4th pin (VDD) connects I/O1 the 1st pin, holds be connected with external power+5V; 11st pin (VSS) ground connection; 12nd pin and the 13rd pin make input pin, the input signal of weighing that serial received chip U3 (HX711) produces, 12nd pin is digital signal serial input terminal of weighing, connect chip U3 (HX711) the 12nd pin, 13rd pin is serial synchronization clock input end, connects chip U3 (HX711) the 11st pin; 2nd pin and the 3rd pin make input pin, the weigh display translation signal of serial received after single-chip microcomputer U2 (EM78P153) process, 2nd pin is the capable input end of the digital train of signal of display of weighing, connect single-chip microcomputer U1 (PIC16LF873) the 3rd pin, 3rd pin is serial synchronization clock input end, connects single-chip microcomputer U1 (PIC16LF873) the 4th pin; 1st pin, the 14th pin connect single-chip microcomputer U1 (PIC16LF873) the 28th pin respectively
,27th pin, forms two-way data communication with single-chip microcomputer U1 (PIC16LF873), receives the cheating information that single-chip microcomputer U1 (PIC16LF873) sends, sends supervisory instruction to single-chip microcomputer U1 (PIC16LF873); 5th, 6,7,8,9,10 pins control the sending and receiving of radio receiving transmitting module RF (JF24D) wireless data, and the 5th pin meets radio receiving transmitting module RF (JF24D) the 6th pin (CS); 6th pin meets radio receiving transmitting module RF (JF24D) the 5th pin (MOSI); 7th pin meets radio receiving transmitting module RF (JF24D) the 4th pin (SCK); 8th pin meets radio receiving transmitting module RF (JF24D) the 3rd pin (CE); 9th pin meets radio receiving transmitting module RF (JF24D) the 2nd pin (MISO); 10th pin meets radio receiving transmitting module RF (JF24D) the 8th pin (IRQ).
Clock chip U4 (DS1302): the 8th pin (VCC1) is primary power input end, connects I/O2 the 14th pin (+3.3V); 1st pin (VCC2) is standby power supply input end, connects I/O2 the 14th pin (+3.3V) by resistance R3; 2nd pin and the 3rd pin are crystal oscillator incoming end, meet crystal oscillator Y1, and crystal oscillator frequency is 32.768KHz; 4th pin (VSS) ground connection; 5th pin (CE) is function end, and control the data transmission of clock chip U4 (DS1302), the transmission of data controls by single-chip microcomputer U1 (PIC16LF873), connects the 26th pin of single-chip microcomputer U1 (PIC16LF873); 6th pin is (I/O) data transmission terminal, realizes and single-chip microcomputer U1 (PIC16LF873) bidirectional data transfers, connects the 25th pin of single-chip microcomputer U1 (PIC16LF873); 7th pin (SCLK) is synchronizing clock signals input end, connects the 23rd pin of single-chip microcomputer U1 (PIC16LF873).
Radio receiving transmitting module RF (JF24D): the 1st pin (VCC) connects I/O2 the 14th pin (+3.3V); The supervisory instruction that digital self-indicating scale management platform sends, for receiving data output end, receives and is transferred to single-chip microcomputer U2 (EM78P153), connecing single-chip microcomputer U2 (EM78P153) the 9th pin by the 2nd pin (MISO); 3rd pin (CE) is function end, controls radio receiving transmitting module RF (JF24D) sending and receiving, and sending and receiving state controls by single-chip microcomputer U2 (EM78P153), connects single-chip microcomputer U2 (EM78P153) the 8th pin; 4th pin (SCK) is clock signal input terminal, connects single-chip microcomputer U2 (EM78P153) the 7th pin; 5th pin (MOSI) is for sending data input pin, and the data of input are cheating information, the battery ANOMALOUS VARIATIONS information of single-chip microcomputer U2 (EM78P153) record and preservation, connect single-chip microcomputer U2 (EM78P153) the 6th pin; 6th pin (CS) is bus Enable Pin, controls, connect single-chip microcomputer U2 (EM78P153) the 5th pin by single-chip microcomputer U2 (EM78P153); 7th pin (NC) is unsettled; 8th pin (IRQ) is sending and receiving state flag bit, and when there being sending and receiving signal, single-chip microcomputer U2 (EM78P153) produces interruption, enters wireless data sending and receiving program, connects single-chip microcomputer U2 (EM78P153) the 10th pin; 9th pin (NC) is unsettled; 10th pin (GND) ground connection.
The present invention has the following advantages:
1, there is conventional digital self-indicating scale original function;
2, have LOAD CELLS input and output weight information is gathered and analytic function automatically;
3, have record and preserve cheating weighing information (cheating weigh number of times, the time, weight, digital self-indicating scale numbering) function;
4, each digital self-indicating scale has unique No. ID;
5, there is the function of Wireless Data Transmission.
Apply digital self-indicating scale of the present invention can automatically record and preserve weight, unit price, the amount of money, the cheating information such as time and No. ID of digital self-indicating scale, and the information of record is sent to data relay platform by short-distance wireless communication module, this information is transmitted to digital self-indicating scale comprehensive management platform by network communication (GPRS) by data relay platform again, numeral self-indicating scale, data relay platform and comprehensive management platform form a complete dynamic digital self-indicating scale management system, and (data relay platform and digital self-indicating scale comprehensive management platform be not in the present invention, therefore be not described).
Accompanying drawing explanation
Fig. 1 is the circuit module principle of work block diagram of digital self-indicating scale of the present invention.
Fig. 2 is the circuit module outline dimensional drawing of digital self-indicating scale of the present invention.
Fig. 3 is the circuit module pin arrangements figure of digital self-indicating scale of the present invention.
Fig. 4 is the electronic circuit schematic diagram of the circuit module of digital self-indicating scale of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, in empty frame be the circuit module principle of work block diagram with the digital self-indicating scale of anti-cheating function of the present invention.
(A1) be signal filtering amplifying circuit, enlargement factor is 128dB, external LOAD CELLS, the voltage signal of input LOAD CELLS, and the signal after amplification exports (A/D) D/A converting circuit to;
(A/D) be D/A converting circuit, simulating signal is converted into digital signal, send (CPU1, CPU2) single-chip microcomputer process and analysis;
(CPU1) be single chip circuit, external 5*5 keyboard, hummer and display, input through keyboard instructions such as receiving unit price, reset, allowance for bark, return, and export unit price, weight, unit, amount of money display data by serial mode, send verbal cue signal by hummer, realize traditional digital self-indicating scale function;
(CPU2) be single chip circuit, the output weight signal of collection from A/D D/A converting circuit and the weight display of CPU1 output, external wireless sending module (RF), function has: 1, gather and comparison input of weighing, output signal; 2, record when there being cheating and preserve cheating information; 3, cheating information is sent by wireless sending module (RF); 4, receive the supervisory instruction that (RF) management system sends, and realize different management functions according to instruction;
(RF) be wireless transceiver circuit, frequency of operation is 2.4GHz, the wireless cheating information data sending (CPU2) and transmit, the supervisory instruction that receiving management system sends, and realizes the wireless transmission of data and instruction;
Date circuit produce year, month, day, hour, min, second signal, meet CPU1, when there is cheating, date-time information is transferred to (CPU2) through (CPU1), (CPU1) and between (CPU2) serial mode communication is adopted, for recording the date and time that cheating occurs;
Power supply 1 is primary power, is input as 5.5 ~ 9.6V DC voltage, for circuit each in module provides direct-current working volts, exports as+3.3V DC voltage, for external circuit provides+3.3V direct-current working volts;
Power supply 2 is LOAD CELLS power source special, external LOAD CELLS power end;
A2 is battery voltage detection circuit, is input as LOAD CELLS operating voltage, and the voltage of output is connected to (A/D) D/A converting circuit.
As shown in Figure 2
,for the circuit module outline dimensional drawing of digital self-indicating scale of the present invention.
As shown in Figure 3, be the circuit module pin arrangements figure of digital self-indicating scale of the present invention, pin function is as shown in table 1.
Table 1 has the pin function of the digital self-indicating scale circuit module of anti-cheating function
As shown in Figure 4, be the circuit module electronic circuit schematic diagram of digital self-indicating scale of the present invention, circuit connect and working method as follows:
I/O1, I/O2 the 1st pin be DC power anode incoming end, for circuit module provides DC supply, external direct current power supply+5V holds, and inside connects chip U3 (HX711) the 16th pin, triode VT (8050) emitter, integrated three-terminal regulator block IC (LM1117) the 1st pin (Vin input end) and single-chip microcomputer U2 (EM78P153) the 5th pin, 2nd pin is unsettled, 3rd pin is LOAD CELLS DC power supply cathode output end, export+2.5V DC voltage, LOAD CELLS and A/D change-over circuit share a power supply, external LOAD CELLS power positive end, inside connects triode VT (8050) collector and chip U3 (HX711) the 3rd pin (A/D change-over circuit power input), 4th pin, the 5th pin are respectively the positive and negative signal input part of LOAD CELLS, the voltage range of input is 0 ~ 20mV, 4th pin external LOAD CELLS positive signal output terminal, inside connect chip U3 (HX711) the 8th pin (A channel positive input terminal), 5th pin external LOAD CELLS negative signal output terminal, inside connects chip U3 (HX711) the 7th pin (A channel negative input end), 6th pin is unsettled, 7th pin, the 8th pin are battery voltage detection signal positive-negative input end, input voltage range is 0 ~ 40mV, 7th pin external connection battery voltage detection signal positive pole, inside connect chip U3 (HX711) the 10th pin (channel B positive input terminal), 8th pin external connection battery voltage detection signal negative pole, inside connects chip U3 (HX711) the 9th pin (channel B negative input end), 9th pin is the clock signal output terminal of display data Serial output, clocking, and external display driver circuit clock signal input terminal, inside connects single-chip microcomputer U1 (PIC16LF873) the 3rd pin, 10th pin is the data output end of display data Serial output, the display data of the weight after output processing, unit price, the amount of money, temporal information, and external display driver circuit serial data input, inside connects single-chip microcomputer U1 (PIC16LF873) the 4th pin, 11st pin is audio signal output terminal, output language cue, external buzzer, inside connects single-chip microcomputer U1 (PIC16LF873) the 2nd pin, 12nd pin, 13rd pin is earth terminal, make circuit potential reference point, the negative pole of external power supply, interior connecting resistance R2 lower end, electric capacity C1 negative pole, electric capacity C2 negative pole, electric capacity C3 negative pole, electric capacity C4 negative pole, single-chip microcomputer U1 (PIC16LF873) the 8th pin (VSS), single-chip microcomputer U1 (PIC16LF873) the 19th pin (VSS), single-chip microcomputer U2 (EM78P153) the 11st pin (VSS), chip U3 (HX711) the 5th pin (AGND), chip U3 (HX711) the 14th pin (XI), chip U3 (HX711) the 15th pin (RATE), clock chip U4 (DS1302) the 4th pin (GND), radio receiving transmitting module RF (JF24D) the 10th pin (GND), 14th pin is+3.3V output end of stabilized voltage supply, for external circuit provides+3.3V power supply, inside connects integrated three-terminal regulator block IC (LM1117) the 3rd pin (output terminal), 15th, 16,17,18,19,20,21,22,23,24 pin totally 10 pins, form 5*5 keyboard signal input end, 15th, 16,17,18,19 pin are the capable signal input part of keyboard, inside connect single-chip microcomputer U1 (PIC16LF873) corresponding the 11st, 12,13,14,15 pin, 20th, 21,22,23,24 pin are keyboard column signal input end, inside connect single-chip microcomputer U1 (PIC16LF873) corresponding the 16th, 17,18,21,22 pin,
Triode VT (8050) and resistance R1, resistance R2, electric capacity C1 form series type direct current regulation source, for external LOAD CELLS provides direct-current working volts; Resistance R1, resistance R2 are sample resistance, determine the size of output voltage; Electric capacity C1 is voltage output filter capacitor; Triode VT (8050) is power adjustment pipe, emitter connects the 1st pin of I/O1, for the input pin of external power supply, base stage connects chip U3 (HX711) the 2nd pin, 3rd pin of collector connecting resistance R1 upper end, electric capacity C1 positive pole, chip U3 (HX711) the 3rd pin, I/O1, for stabilized voltage supply output pin, export DC voltage+2.5V;
Integrated three-terminal regulator block IC (LM1117) and electric capacity C3, electric capacity C4 form an integrated DC stabilized voltage supply, for single-chip microcomputer U1 (PIC16LF873), clock chip U4 (DS1302) and radio receiving transmitting module RF (JF24D) circuit provide+3.3V DC voltage; Integrated three-terminal regulator block IC (LM1117): the 1st pin (Vin) connects the 1st pin of I/O1; 2nd pin (GND) is earth terminal, connects the 12nd pin of I/O1; 3rd pin (Vout) is regulator block output terminal, export+3.3V DC voltage, connect single-chip microcomputer U1 (PIC16LF873) the 1st pin (MCLR/VPP), single-chip microcomputer U1 (PIC16LF873) the 20th pin (VDD), clock chip U4 (DS1302) the 8th pin (VCC1), radio receiving transmitting module RF (JF24D) the 1st pin (VCC), I/O2 the 14th pin (+3.3V); Electric capacity C3, electric capacity C4 are power filtering capacitor, electric capacity C3 positive pole connects integrated three-terminal regulator block IC (LM1117) the 1st pin, electric capacity C3 minus earth, electric capacity C4 positive pole connects integrated three-terminal regulator block IC (LM1117) the 3rd pin, electric capacity C4 minus earth;
U3 (HX711) is a 24 the A/D converter chips designed for LOAD CELLS, and inside comprises stabilized voltage supply, on-chip clock oscillator, two low-noise programmable amplifying circuits; Pga circuit A channel is used as LOAD CELLS voltage input channel (A1), gain is set to 128dB, full scale differential input signal amplitude is ± 20mV, pga circuit channel B is used as battery voltage detection input channel (A2), gain is 64dB, and full scale differential input signal amplitude is ± 40mV; The voltage digital signal that pga circuit A channel, channel B export and single-chip microcomputer adopt serial communication, and communication speed is set to 10Hz; Integrated three-terminal regulator block IC (LM1117) function is exactly amplify and detection to cell voltage the voltage signal that LOAD CELLS produces, and carrying out A/D conversion, the voltage digital signal Serial output after conversion is to single-chip microcomputer U1 (PIC16LF873);
Chip U3 (HX711): the 1st pin (VSUP) is digital power input end; 16th pin (DVDD) is chip U3 (HX711) interior voltage-stabilized power supply input end, is connected with external power positive pole by I/O1 the 1st pin; 2nd pin (BASE) is chip U3 (HX711) interior voltage-stabilized power supply control output end, connects the base stage of triode VT (8050); 3rd pin (AVDD) is chip U3 (HX711) inner A/D analog power input end, connect the collector of triode VT (8050), be connected with LOAD CELLS by I/O1 the 3rd pin, make A/D change-over circuit and LOAD CELLS use same power supply; 4th pin (VFB) is chip U3 (HX711) interior voltage-stabilized power supply control input end, connecting resistance R1 lower end, resistance R2 upper end; 5th pin (AGND) is simulating signal earth terminal, ground connection; 6th pin (VBG) is reference voltage output terminal, connects with electric capacity C2 positive pole, and electric capacity C2 is power filtering capacitor, electric capacity C2 minus earth; 7th pin (INA-), the 8th pin (INA+) be respectively A channel differential signal-,+input end, by I/O1 the 4th pin and the 3rd pin connect LOAD CELLS export voltage signal; 9th pin (INB-), the 10th pin (INB+) be respectively channel B differential signal-,+input end, by I/O1 the 7th pin and the 6th pin connect battery voltage detection circuit export voltage signal; 11st pin (PD_SCK), the 12nd pin (D_OUT) composition data Serial output, numerical data of weighing in chip U3 (HX711) is sent in single-chip microcomputer U1 (PIC16LF873), 11st pin (PD_SCK) is clock line, connect single-chip microcomputer U1 (PIC16LF873) the 6th pin, 12nd pin (D_OUT) is data line, Serial output is weighed digital signal, connects single-chip microcomputer U1 (PIC16LF873) the 7th pin; 13rd pin (XO), the 14th pin (XI) are external crystal-controlled oscillation incoming end, adopt chip U3 (HX711) internal clocking oscillatory circuit need not external crystal oscillator, and the 13rd pin is unsettled, the 14th pin (XI) ground connection; 15th pin (RATE) is output data rate control input end, and message transmission rate is 10Hz, ground connection;
Single-chip microcomputer U1 (PIC16LF873) is 8 CMOS flash memory single-chip microcomputers, the inner 48KHz oscillator with high precision 4MHz oscillator and low-power consumption, there is the I/O pin that 22 independent, direction control, 4K byte FLASH program memory, 192 byte SRAM, 128 byte EEROM, 1 serial communication end, 28 bit timings/counters, 1 16 bit timings/counter, operating voltage is 2.0 ~ 3.6V, with different sequence number, each device is programmed, each device is made to have unique sequence number, EEROM has power failure data hold function, cheating information-storing device,
Single-chip microcomputer U1 (PIC16LF873): the 1st pin, the 20th pin meet direct supply+3.3V and hold, 2nd pin makes output pin, exports voice signal, by I/O1 the 11st pin external buzzer, 3rd pin and the 4th pin make output pin, and serial ports exports weighing information display data, and the 3rd pin output clock synchronizing signal, connects I/O1 the 9th pin, and the 4th pin serial output data signal connects I/O1 the 10th pin, by I/O1 the 9th pin, the 10th pin, and external display driver circuit, 5th pin is unsettled, 6th pin and the 7th pin make input pin, the digital signal of weighing that receiving chip U3 (HX711) exports, 6th pin is digital signal serial input terminal of weighing, connect chip U3 (HX711) the 12nd pin, 7th pin is serial synchronization clock input end, connects chip U3 (HX711) the 11st pin, 8th pin (VSS) and the 19th pin (VSS) ground connection, 9th pin (OSC1) and the 10th pin (OSC2) are external crystal-controlled oscillation incoming end, adopt internal oscillator (4MHz) do not use external crystal-controlled oscillation, the 9th pin (OSC1) and the 10th pin (OSC2) unsettled, 11st, 12,13,14,15,16,17,18,21,22 pin make input pin, respectively with I/O2 the 15th, 16,17,18,19,20,21,22,23,24 pin connect, 11st, 12,13,14,15 pin are keyboard column signal input end, 16th, 17,18,21,22 pin are the capable signal input part of keyboard, external 5*5 keyboard, receives keyboard input signal, 23rd, 25, 26 pin meet clock chip U4 (DS1302) the 7th respectively, 6, 5 pin, form bidirectional linked list communication between single-chip microcomputer U1 (PIC16LF873) and clock chip U4 (DS1302), 23rd pin is synchronizing clock signals output terminal, 25th pin is bidirectional data transfers end, 26th pin is Enable Pin, when the 26th pin (RB5=1) is for high level, the date that receive clock chip U4 (DS1302) produces, time data, when the 26th pin (RB5=0) is for low level, to U4 (DS1302) initialization of clock chip U4 (DS1302) tranmitting data register chip, date, the data of time adjustment, 24th pin is unsettled, 27th, 28 pin connect single-chip microcomputer U2 (EM78P153) the 14th pin and the 11st pin respectively, form the both-way communication between single-chip microcomputer U1 (PIC16LF873) and single-chip microcomputer U2 (EM78P153), 27th pin is synchronizing clock signals line, 28th pin is bidirectional data transfers line, data between single-chip microcomputer U1 (PIC16LF873) and single-chip microcomputer U2 (EM78P153) are received, send out and control by single-chip microcomputer U2 (EM78P153), when the 27th pin (RB6=0) is for electronegative potential, when 28th pin (RB7=1) is for noble potential, receive the supervisory instruction that single-chip microcomputer U2 (EM78P153) forwards, when 27th pin (RB6=1) is for noble potential, when 28th pin (RB7=0) is for electronegative potential, send cheating weighing information,
The function that single-chip microcomputer U1 (PIC16LF873) realizes has:
(1) receiving chip U3 (HX711) digital signal of weighing, according to the information (unit price) of input through keyboard, calculates the amount of money, is processed into display data and exports, produce voice message signal simultaneously;
(2) when there is cheating, instruction is sent by single-chip microcomputer U2 (EM78P153), the cheating information such as record actual weight, display weight, the amount of money, time;
(3) from the accurate function of effect: before the use that comes into the market, realized the check and correction of weighing with show by wireless instructions, this function will be closed after the first use;
(4) to clock chip U4 (DS1302) initialization;
Single-chip microcomputer U2 (EM78P153) is a 8 single-chip microcomputers, operating voltage 2.5 ~ 5.5V, inner with high precision 4MHz oscillator, 14 I/O pins, 512*13 bit slice internal program storer, 32 byte SRAM, 18 bit timings/counter, 3 interrupt sources;
Single-chip microcomputer U2 (EM78P153): the 4th pin (VDD) connects I/O1 the 1st pin, holds be connected with external power+5V; 11st pin (VSS) ground connection; 12nd pin and the 13rd pin make input pin, the input signal of weighing that serial received chip U3 (HX711) produces, 12nd pin is digital signal serial input terminal of weighing, connect chip U3 (HX711) the 12nd pin, 13rd pin is serial synchronization clock input end, connects chip U3 (HX711) the 11st pin; 2nd pin and the 3rd pin make input pin, the weigh display translation signal of serial received after single-chip microcomputer U2 (EM78P153) process, 2nd pin is the capable input end of the digital train of signal of display of weighing, connect single-chip microcomputer U1 (PIC16LF873) the 3rd pin, 3rd pin is serial synchronization clock input end, connects single-chip microcomputer U1 (PIC16LF873) the 4th pin; 1st pin, the 14th pin connect single-chip microcomputer U1 (PIC16LF873) the 28th pin respectively
,27th pin, forms two-way data communication with single-chip microcomputer U1 (PIC16LF873), receives the cheating information that single-chip microcomputer U1 (PIC16LF873) sends, sends supervisory instruction to single-chip microcomputer U1 (PIC16LF873); 5th, 6,7,8,9,10 pins control the sending and receiving of radio receiving transmitting module RF (JF24D) wireless data, and the 5th pin meets radio receiving transmitting module RF (JF24D) the 6th pin (CS); 6th pin meets radio receiving transmitting module RF (JF24D) the 5th pin (MOSI); 7th pin meets radio receiving transmitting module RF (JF24D) the 4th pin (SCK); 8th pin meets radio receiving transmitting module RF (JF24D) the 3rd pin (CE); 9th pin meets radio receiving transmitting module RF (JF24D) the 2nd pin (MISO); 10th pin meets radio receiving transmitting module RF (JF24D) the 8th pin (IRQ);
The function that single-chip microcomputer U2 (EM78P153) realizes has:
(1) input of weighing, output signal is received, analysis judges whether to have cheating, when there being cheating, instruction is sent to single-chip microcomputer U1 (PIC16LF873) through the 1st pin and the 14th pin, and receive the cheating information such as weight, unit price, the amount of money, time that single-chip microcomputer U1 (PIC16LF873) beams back, preserve and pass through radio receiving transmitting module RF (JF24D) the cheating information such as weight, unit price, the amount of money, time and No. ID are sent to digital self-indicating scale management platform;
(2) monitor cell voltage change, when cell voltage variation abnormality, by radio receiving transmitting module RF (JF24D), cell voltage change information is wirelessly transmitted to digital self-indicating scale management platform;
(3) wireless receiving and dispatching data management, keeps being connected by Wireless Data Transmission mode and management platform, realizes real-time, system management to digital self-indicating scale;
Clock chip U4 (DS1302) be DALLAS company of the U.S. release a kind of high-performance, low-power consumption, band RAM real-time timepiece chip, operating voltage is 2.5V ~ 5.5V, three-wire interface and CPU is adopted to carry out synchronous communication, it can to year, month, day, week, time, minute, second carries out timing, has leap year compensate function.Clock chip U4 (DS1302) and crystal oscillator Y1, resistance R3 form in the present invention date, time circuit, produce date, time signal;
Clock chip U4 (DS1302): the 8th pin (VCC1) is primary power input end, connects I/O2 the 14th pin (+3.3V); 1st pin (VCC2) is standby power supply input end, connects I/O2 the 14th pin (+3.3V) by resistance R3; 2nd pin and the 3rd pin are crystal oscillator incoming end, meet crystal oscillator Y1, and crystal oscillator frequency is 32.768KHz; 4th pin (VSS) ground connection; 5th pin (CE) is function end, and control the data transmission of clock chip U4 (DS1302), the transmission of data controls by single-chip microcomputer U1 (PIC16LF873), connects the 26th pin of single-chip microcomputer U1 (PIC16LF873); 6th pin is (I/O) data transmission terminal, realizes and single-chip microcomputer U1 (PIC16LF873) bidirectional data transfers, connects the 25th pin of single-chip microcomputer U1 (PIC16LF873); 7th pin (SCLK) is synchronizing clock signals input end, connects the 23rd pin of single-chip microcomputer U1 (PIC16LF873);
Clock chip U4 (DS1302) function produce exactly year, month, day, week, time, minute, second time signal, when there is cheating, under single-chip microcomputer U1 (PIC16LF873) controls, the time signal of generation is sent to single-chip microcomputer U1 (PIC16LF873) by clock chip U4 (DS1302);
RF (JF24D) is wireless data transceiving two-way modules, and frequency of operation is 2.4GHz, is operated in the ISM band of global open, exempt from licence to use, radio receiving transmitting module RF (JF24D) has 81 passages, can arrange arbitrarily and not interfere with each other, transfer rate is 1MHz
receiving sensitivity is-85dB, and maximum transmission distance is 100m, and DLL (dynamic link library) is SPI digital interface;
Radio receiving transmitting module RF (JF24D): the 1st pin (VCC) connects I/O2 the 14th pin (+3.3V); The supervisory instruction that digital self-indicating scale management platform sends, for receiving data output end, receives and is transferred to single-chip microcomputer U2 (EM78P153), connecing single-chip microcomputer U2 (EM78P153) the 9th pin by the 2nd pin (MISO); 3rd pin (CE) is function end, controls radio receiving transmitting module RF (JF24D) sending and receiving, and sending and receiving state controls by single-chip microcomputer U2 (EM78P153), connects single-chip microcomputer U2 (EM78P153) the 8th pin; 4th pin (SCK) is clock signal input terminal, connects single-chip microcomputer U2 (EM78P153) the 7th pin; 5th pin (MOSI) is for sending data input pin, and the data of input are cheating information, the battery ANOMALOUS VARIATIONS information of single-chip microcomputer U2 (EM78P153) record and preservation, connect single-chip microcomputer U2 (EM78P153) the 6th pin; 6th pin (CS) is bus Enable Pin, controls, connect single-chip microcomputer U2 (EM78P153) the 5th pin by single-chip microcomputer U2 (EM78P153); 7th pin (NC) is unsettled; 8th pin (IRQ) is sending and receiving state flag bit, and when there being sending and receiving signal, single-chip microcomputer U2 (EM78P153) produces interruption, enters wireless data sending and receiving program, connects single-chip microcomputer U2 (EM78P153) the 10th pin; 9th pin (NC) is unsettled; 10th pin (GND) ground connection;
The major function of radio receiving transmitting module RF (JF24D) is exactly the sending and receiving of instruction and data, wirelessly realize the connection between digital self-indicating scale and digital self-indicating scale management platform, realize management platform and real-time monitoring and control is carried out to digital self-indicating scale.
circuit module assembling process is as follows:
1, by Fig. 4 principle diagram design pcb board, pcb board is of a size of 40mm*30mm*1.2mm;
2, by specification and the parameter buying components and parts of the components and parts of Fig. 4 schematic diagram;
3, coding, programming single-chip microcomputer PLC16LF873, single-chip microcomputer EM78P153;
4, components and parts are welded to pcb board;
5, use epoxy encapsulation circuit, make digital self-indicating scale circuit module of the present invention, as shown in Figure 2, pin arrangements as shown in Figure 3 for physical dimension.
Claims (8)
1. there is the digital self-indicating scale of anti-cheating function, voltage amplification will be had, battery voltage detection, A/D changes, keyboard signal inputs, the amount of money calculates, display data export, voice message signal produces, cheating data analysis judges, cheating information record, accurate from effect, wireless data transceiving, the management of wireless data transceiving, the circuit that date-time produces function is welded on one piece of pcb board, make a circuit module, the external LOAD CELLS of this circuit module, 5*5 keyboard, display, hummer, 5.5V ~ 9.6V direct supply, form the digital self-indicating scale with anti-cheating function, the circuit of the circuit module of numeral self-indicating scale connects as follows:
(1) voltage signal of external LOAD CELLS inputs to signal filtering amplifying circuit (A1), and the signal after amplification exports D/A converting circuit (A/D) to;
(2) simulating signal inputted is converted into digital signal through D/A converting circuit (A/D), send the process of CPU1, CPU2 single-chip microcomputer and analysis;
(3) single chip circuit CPU1 receives unit price, resets, allowances for bark, returns input through keyboard instruction, and exports unit price, weight, unit, amount of money display data by serial mode;
(4) single chip circuit CPU2 gathers the output weight signal of D/A converting circuit (A/D) and the weight display of CPU1 output;
(5) wireless transceiver circuit (RF) sends the cheating information data be kept in CPU2, the supervisory instruction that receiving management system sends, and stored in CPU2;
(6) date circuit produce year, month, day, hour, min, second signal, export CPU1 to;
(7) power supply 1 is primary power, is input as 5.5 ~ 9.6V DC voltage, exports as+3.3V DC voltage;
(8) power supply 2 is LOAD CELLS power source special, external LOAD CELLS power end;
(9) operating voltage of LOAD CELLS inputs to battery voltage detection circuit A2, and the output voltage of A2 is connected to D/A converting circuit (A/D), it is characterized in that: the circuit module of above-mentioned digital self-indicating scale adopts dip form, amount to 24 pins, pin 1 ~ 12 is I/O1, and pin 13 ~ 24 is I/O2, I/O1, I/O2 the 1st pin be DC power anode incoming end, for circuit module provides DC supply, external direct current power supply+5V holds, and inside connects chip U3 (HX711) the 16th pin, triode VT (8050) emitter, integrated three-terminal regulator block IC (LM1117) the 1st pin (Vin input end) and single-chip microcomputer U2 (EM78P153) the 5th pin, 2nd pin is unsettled, 3rd pin is LOAD CELLS DC power supply cathode output end, export+2.5V DC voltage, LOAD CELLS and A/D change-over circuit share a power supply, external LOAD CELLS power positive end, inside connects triode VT (8050) collector and chip U3 (HX711) the 3rd pin (A/D change-over circuit power input), 4th pin, the 5th pin are respectively the positive and negative signal input part of LOAD CELLS, the voltage range of input is 0 ~ 20mV, 4th pin external LOAD CELLS positive signal output terminal, inside connect chip U3 (HX711) the 8th pin (A channel positive input terminal), 5th pin external LOAD CELLS negative signal output terminal, inside connects chip U3 (HX711) the 7th pin (A channel negative input end), 6th pin is unsettled, 7th pin, the 8th pin are battery voltage detection signal positive-negative input end, input voltage range is 0 ~ 40mV, 7th pin external connection battery voltage detection signal positive pole, inside connect chip U3 (HX711) the 10th pin (channel B positive input terminal), 8th pin external connection battery voltage detection signal negative pole, inside connects chip U3 (HX711) the 9th pin (channel B negative input end), 9th pin is the clock signal output terminal of display data Serial output, clocking, and external display driver circuit clock signal input terminal, inside connects single-chip microcomputer U1 (PIC16LF873) the 3rd pin, 10th pin is the data output end of display data Serial output, the display data of the weight after output processing, unit price, the amount of money, temporal information, and external display driver circuit serial data input, inside connects single-chip microcomputer U1 (PIC16LF873) the 4th pin, 11st pin is audio signal output terminal, output language cue, external buzzer, inside connects single-chip microcomputer U1 (PIC16LF873) the 2nd pin, 12nd pin, 13rd pin is earth terminal, make circuit potential reference point, the negative pole of external power supply, interior connecting resistance R2 lower end, electric capacity C1 negative pole, electric capacity C2 negative pole, electric capacity C3 negative pole, electric capacity C4 negative pole, single-chip microcomputer U1 (PIC16LF873) the 8th pin (VSS), single-chip microcomputer U1 (PIC16LF873) the 19th pin (VSS), single-chip microcomputer U2 (EM78P153) the 11st pin (VSS), chip U3 (HX711) the 5th pin (AGND), chip U3 (HX711) the 14th pin (XI), chip U3 (HX711) the 15th pin (RATE), clock chip U4 (DS1302) the 4th pin (GND), radio receiving transmitting module RF (JF24D) the 10th pin (GND), 14th pin is+3.3V output end of stabilized voltage supply, for external circuit provides+3.3V power supply, inside connects integrated three-terminal regulator block IC (LM1117) the 3rd pin (output terminal), 15th, 16,17,18,19,20,21,22,23,24 pin totally 10 pins, form 5*5 keyboard signal input end, 15th, 16,17,18,19 pin are the capable signal input part of keyboard, inside connect single-chip microcomputer U1 (PIC16LF873) corresponding the 11st, 12,13,14,15 pin, 20th, 21,22,23,24 pin are keyboard column signal input end, inside connect single-chip microcomputer U1 (PIC16LF873) corresponding the 16th, 17,18,21,22 pin.
2. the digital self-indicating scale with anti-cheating function according to claim 1, it is characterized in that: triode VT (8050) and resistance R1, resistance R2, electric capacity C1 form series type direct current regulation source, for external LOAD CELLS provides direct-current working volts; Resistance R1, resistance R2 are sample resistance, determine the size of output voltage; Electric capacity C1 is voltage output filter capacitor; Triode VT (8050) is power adjustment pipe, emitter connects the 1st pin of I/O1, for the input pin of external power supply, base stage connects chip U3 (HX711) the 2nd pin, 3rd pin of collector connecting resistance R1 upper end, electric capacity C1 positive pole, chip U3 (HX711) the 3rd pin, I/O1, for stabilized voltage supply output pin, export DC voltage+2.5V.
3. the digital self-indicating scale with anti-cheating function according to claim 1, it is characterized in that: integrated three-terminal regulator block IC (LM1117) and electric capacity C3, electric capacity C4 form an integrated DC stabilized voltage supply, for single-chip microcomputer U1 (PIC16LF873), clock chip U4 (DS1302) and radio receiving transmitting module RF (JF24D) circuit provide+3.3V DC voltage, integrated three-terminal regulator block IC (LM1117): the 1st pin (Vin) connects the 1st pin of I/O1; 2nd pin (GND) is earth terminal, connects the 12nd pin of I/O1; 3rd pin (Vout) is regulator block output terminal, export+3.3V DC voltage, connect single-chip microcomputer U1 (PIC16LF873) the 1st pin (MCLR/VPP), single-chip microcomputer U1 (PIC16LF873) the 20th pin (VDD), clock chip U4 (DS1302) the 8th pin (VCC1), radio receiving transmitting module RF (JF24D) the 1st pin (VCC), I/O2 the 14th pin (+3.3V); Electric capacity C3, electric capacity C4 are power filtering capacitor, electric capacity C3 positive pole connects integrated three-terminal regulator block IC (LM1117) the 1st pin, electric capacity C3 minus earth, electric capacity C4 positive pole connects integrated three-terminal regulator block IC (LM1117) the 3rd pin, electric capacity C4 minus earth.
4. the digital self-indicating scale with anti-cheating function according to claim 1, is characterized in that: the chip U3 (HX711): the 1st pin (VSUP) is digital power input end; 16th pin (DVDD) is chip U3 (HX711) interior voltage-stabilized power supply input end, is connected with external power positive pole by I/O1 the 1st pin; 2nd pin (BASE) is chip U3 (HX711) interior voltage-stabilized power supply control output end, connects the base stage of triode VT (8050); 3rd pin (AVDD) is chip U3 (HX711) inner A/D analog power input end, connect the collector of triode VT (8050), be connected with LOAD CELLS by I/O1 the 3rd pin, make A/D change-over circuit and LOAD CELLS use same power supply; 4th pin (VFB) is chip U3 (HX711) interior voltage-stabilized power supply control input end, connecting resistance R1 lower end, resistance R2 upper end; 5th pin (AGND) is simulating signal earth terminal, ground connection; 6th pin (VBG) is reference voltage output terminal, connects with electric capacity C2 positive pole, and electric capacity C2 is power filtering capacitor, electric capacity C2 minus earth; 7th pin (INA-), the 8th pin (INA+) be respectively A channel differential signal-,+input end, by I/O1 the 4th pin and the 3rd pin connect LOAD CELLS export voltage signal; 9th pin (INB-), the 10th pin (INB+) be respectively channel B differential signal-,+input end, by I/O1 the 7th pin and the 6th pin connect battery voltage detection circuit export voltage signal; 11st pin (PD_SCK), the 12nd pin (D_OUT) composition data Serial output, numerical data of weighing in chip U3 (HX711) is sent in single-chip microcomputer U1 (PIC16LF873), 11st pin (PD_SCK) is clock line, connect single-chip microcomputer U1 (PIC16LF873) the 6th pin, 12nd pin (D_OUT) is data line, Serial output is weighed digital signal, connects single-chip microcomputer U1 (PIC16LF873) the 7th pin; 13rd pin (XO), the 14th pin (XI) are external crystal-controlled oscillation incoming end, and chip U3 (HX711) internal clocking oscillatory circuit need not external crystal oscillator, and the 13rd pin is unsettled, the 14th pin (XI) ground connection; 15th pin (RATE) is output data rate control input end, and message transmission rate is 10Hz, ground connection.
5. the digital self-indicating scale with anti-cheating function according to claim 1, is characterized in that: the single-chip microcomputer U1 (PIC16LF873): the 1st pin, the 20th pin meet direct supply+3.3V and hold, 2nd pin makes output pin, exports voice signal, by I/O1 the 11st pin external buzzer, 3rd pin and the 4th pin make output pin, and serial ports exports weighing information display data, and the 3rd pin output clock synchronizing signal, connects I/O1 the 9th pin, and the 4th pin serial output data signal connects I/O1 the 10th pin, by I/O1 the 9th pin, the 10th pin, and external display driver circuit, 5th pin is unsettled, 6th pin and the 7th pin make input pin, the digital signal of weighing that receiving chip U3 (HX711) exports, 6th pin is digital signal serial input terminal of weighing, connect chip U3 (HX711) the 12nd pin, 7th pin is serial synchronization clock input end, connects chip U3 (HX711) the 11st pin, 8th pin (VSS) and the 19th pin (VSS) ground connection, 9th pin (OSC1) and the 10th pin (OSC2) are external crystal-controlled oscillation incoming end, internal oscillator (4MHz), the 9th pin (OSC1) and the 10th pin (OSC2) unsettled, 11st, 12,13,14,15,16,17,18,21,22 pin make input pin, respectively with I/O2 the 15th, 16,17,18,19,20,21,22,23,24 pin connect, 11st, 12,13,14,15 pin are keyboard column signal input end, 16th, 17,18,21,22 pin are the capable signal input part of keyboard, external 5*5 keyboard, receives keyboard input signal, 23rd, 25, 26 pin meet clock chip U4 (DS1302) the 7th respectively, 6, 5 pin, form bidirectional linked list communication between single-chip microcomputer U1 (PIC16LF873) and clock chip U4 (DS1302), 23rd pin is synchronizing clock signals output terminal, 25th pin is bidirectional data transfers end, 26th pin is Enable Pin, when the 26th pin (RB5=1) is for high level, the date that receive clock chip U4 (DS1302) produces, time data, when the 26th pin (RB5=0) is for low level, to U4 (DS1302) initialization of clock chip U4 (DS1302) tranmitting data register chip, date, the data of time adjustment, 24th pin is unsettled, 27th, 28 pin connect single-chip microcomputer U2 (EM78P153) the 14th pin and the 11st pin respectively, form the both-way communication between single-chip microcomputer U1 (PIC16LF873) and single-chip microcomputer U2 (EM78P153), 27th pin is synchronizing clock signals line, 28th pin is bidirectional data transfers line, data between single-chip microcomputer U1 (PIC16LF873) and single-chip microcomputer U2 (EM78P153) are received, send out and control by single-chip microcomputer U2 (EM78P153), when the 27th pin (RB6=0) is for electronegative potential, when 28th pin (RB7=1) is for noble potential, receive the supervisory instruction that single-chip microcomputer U2 (EM78P153) forwards, when 27th pin (RB6=1) is for noble potential, when 28th pin (RB7=0) is for electronegative potential, send cheating weighing information.
6. the digital self-indicating scale with anti-cheating function according to claim 1, is characterized in that: the single-chip microcomputer U2 (EM78P153): the 4th pin (VDD) connects I/O1 the 1st pin, holds be connected with external power+5V; 11st pin (VSS) ground connection; 12nd pin and the 13rd pin make input pin, the input signal of weighing that serial received chip U3 (HX711) produces, 12nd pin is digital signal serial input terminal of weighing, connect chip U3 (HX711) the 12nd pin, 13rd pin is serial synchronization clock input end, connects chip U3 (HX711) the 11st pin; 2nd pin and the 3rd pin make input pin, the weigh display translation signal of serial received after single-chip microcomputer U2 (EM78P153) process, 2nd pin is the capable input end of the digital train of signal of display of weighing, connect single-chip microcomputer U1 (PIC16LF873) the 3rd pin, 3rd pin is serial synchronization clock input end, connects single-chip microcomputer U1 (PIC16LF873) the 4th pin; 1st pin, the 14th pin connect single-chip microcomputer U1 (PIC16LF873) the 28th pin respectively
,27th pin, forms two-way data communication with single-chip microcomputer U1 (PIC16LF873), receives the cheating information that single-chip microcomputer U1 (PIC16LF873) sends, sends supervisory instruction to single-chip microcomputer U1 (PIC16LF873); 5th, 6,7,8,9,10 pins control the sending and receiving of radio receiving transmitting module RF (JF24D) wireless data, and the 5th pin meets radio receiving transmitting module RF (JF24D) the 6th pin (CS); 6th pin meets radio receiving transmitting module RF (JF24D) the 5th pin (MOSI); 7th pin meets radio receiving transmitting module RF (JF24D) the 4th pin (SCK); 8th pin meets radio receiving transmitting module RF (JF24D) the 3rd pin (CE); 9th pin meets radio receiving transmitting module RF (JF24D) the 2nd pin (MISO); 10th pin meets radio receiving transmitting module RF (JF24D) the 8th pin (IRQ).
7. the digital self-indicating scale with anti-cheating function according to claim 1, is characterized in that: the clock chip U4 (DS1302): the 8th pin (VCC1) is primary power input end, connects I/O2 the 14th pin (+3.3V); 1st pin (VCC2) is standby power supply input end, connects I/O2 the 14th pin (+3.3V) by resistance R3; 2nd pin and the 3rd pin are crystal oscillator incoming end, meet crystal oscillator Y1, and crystal oscillator frequency is 32.768KHz; 4th pin (VSS) ground connection; 5th pin (CE) is function end, and control the data transmission of clock chip U4 (DS1302), the transmission of data controls by single-chip microcomputer U1 (PIC16LF873), connects the 26th pin of single-chip microcomputer U1 (PIC16LF873); 6th pin is (I/O) data transmission terminal, realizes and single-chip microcomputer U1 (PIC16LF873) bidirectional data transfers, connects the 25th pin of single-chip microcomputer U1 (PIC16LF873); 7th pin (SCLK) is synchronizing clock signals input end, connects the 23rd pin of single-chip microcomputer U1 (PIC16LF873).
8. the digital self-indicating scale with anti-cheating function according to claim 1, is characterized in that: the radio receiving transmitting module RF (JF24D): the 1st pin (VCC) connects I/O2 the 14th pin (+3.3V); The supervisory instruction that digital self-indicating scale management platform sends, for receiving data output end, receives and is transferred to single-chip microcomputer U2 (EM78P153), connecing single-chip microcomputer U2 (EM78P153) the 9th pin by the 2nd pin (MISO); 3rd pin (CE) is function end, controls radio receiving transmitting module RF (JF24D) sending and receiving, and sending and receiving state controls by single-chip microcomputer U2 (EM78P153), connects single-chip microcomputer U2 (EM78P153) the 8th pin; 4th pin (SCK) is clock signal input terminal, connects single-chip microcomputer U2 (EM78P153) the 7th pin; 5th pin (MOSI) is for sending data input pin, and the data of input are cheating information, the battery ANOMALOUS VARIATIONS information of single-chip microcomputer U2 (EM78P153) record and preservation, connect single-chip microcomputer U2 (EM78P153) the 6th pin; 6th pin (CS) is bus Enable Pin, controls, connect single-chip microcomputer U2 (EM78P153) the 5th pin by single-chip microcomputer U2 (EM78P153); 7th pin (NC) is unsettled; 8th pin (IRQ) is sending and receiving state flag bit, and when there being sending and receiving signal, single-chip microcomputer U2 (EM78P153) produces interruption, enters wireless data sending and receiving program, connects single-chip microcomputer U2 (EM78P153) the 10th pin; 9th pin (NC) is unsettled; 10th pin (GND) ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310343178.1A CN103424170B (en) | 2013-08-08 | 2013-08-08 | There is the digital self-indicating scale of anti-cheating function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310343178.1A CN103424170B (en) | 2013-08-08 | 2013-08-08 | There is the digital self-indicating scale of anti-cheating function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103424170A CN103424170A (en) | 2013-12-04 |
| CN103424170B true CN103424170B (en) | 2015-11-25 |
Family
ID=49649263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310343178.1A Expired - Fee Related CN103424170B (en) | 2013-08-08 | 2013-08-08 | There is the digital self-indicating scale of anti-cheating function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103424170B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916495A (en) * | 2019-01-18 | 2019-06-21 | 深圳市计量质量检测研究院（国家高新技术计量站、国家数字电子产品质量监督检验中心） | Electronic scale monitoring method and system |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104121978A (en) * | 2014-07-25 | 2014-10-29 | 中山佳维电子有限公司 | Tamper-resistant electronic price scale |
| CN105527009B (en) * | 2014-09-29 | 2019-02-26 | 徐工集团工程机械股份有限公司 | A kind of weighing system and its method with self-calibration function |
| CN105588634A (en) * | 2015-11-30 | 2016-05-18 | 蚌埠大洋传感系统工程有限公司 | Power-saving wireless transmitter for weighing sensor |
| CN107063408A (en) * | 2016-11-12 | 2017-08-18 | 淮阴工学院 | A kind of multifunctional digital electronic scale |
| CN109724680A (en) * | 2019-01-18 | 2019-05-07 | 深圳市计量质量检测研究院（国家高新技术计量站、国家数字电子产品质量监督检验中心） | Weighing anti-cheating method in market |
| CN110301793A (en) * | 2019-07-23 | 2019-10-08 | 奉志强 | A kind of health is drunk the intelligent wineglass and its implementation of management |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0380082A2 (en) * | 1989-01-25 | 1990-08-01 | ISHIDA CO., Ltd. | Sales data transmission system |
| CN201503546U (en) * | 2009-09-25 | 2010-06-09 | 东华大学 | Universal weighing apparatus anti-cheat monitor |
| CN201532677U (en) * | 2009-09-23 | 2010-07-21 | 北京拓盛电子科技有限公司 | Revenue monitoring system of electronic scale |
| CN201688897U (en) * | 2010-03-19 | 2010-12-29 | 四川九洲电器集团有限责任公司 | Anti-cheating electronic scale |
| CN103033241A (en) * | 2012-12-18 | 2013-04-10 | 滨州中裕食品有限公司 | Unprocessed grain receiving measuring system |
-
2013
- 2013-08-08 CN CN201310343178.1A patent/CN103424170B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0380082A2 (en) * | 1989-01-25 | 1990-08-01 | ISHIDA CO., Ltd. | Sales data transmission system |
| CN201532677U (en) * | 2009-09-23 | 2010-07-21 | 北京拓盛电子科技有限公司 | Revenue monitoring system of electronic scale |
| CN201503546U (en) * | 2009-09-25 | 2010-06-09 | 东华大学 | Universal weighing apparatus anti-cheat monitor |
| CN201688897U (en) * | 2010-03-19 | 2010-12-29 | 四川九洲电器集团有限责任公司 | Anti-cheating electronic scale |
| CN103033241A (en) * | 2012-12-18 | 2013-04-10 | 滨州中裕食品有限公司 | Unprocessed grain receiving measuring system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916495A (en) * | 2019-01-18 | 2019-06-21 | 深圳市计量质量检测研究院（国家高新技术计量站、国家数字电子产品质量监督检验中心） | Electronic scale monitoring method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103424170A (en) | 2013-12-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103424170B (en) | There is the digital self-indicating scale of anti-cheating function | |
| CN101965807B (en) | System for individually recording production performance of layers and automatically monitoring environment of layer house | |
| CN201853116U (en) | System for automatically monitoring the environment of chicken house | |
| CN106597947A (en) | Substation equipment test method and system, server and tester | |
| CN103135019A (en) | Power quality monitoring management system based on electric power wide-area network | |
| CN104388948B (en) | Pipeline cathode protection Inspection and monitoring system | |
| CN103413415B (en) | The management system of combustion gas use state in a kind of network management region | |
| CN101216987A (en) | An emergent wireless toxic gas indicator for chemicals leakage accident | |
| CN203522340U (en) | Power consumption load monitoring system | |
| CN106483258A (en) | Air quality data collection and radio transmitting device under a kind of forest environment | |
| CN206096259U (en) | Two -way electric energy metering device of wind generating set and wind generating set | |
| CN101777227A (en) | Electronic scale tax-controlling weighing display controller and electronic scale tax controller | |
| CN103699029A (en) | Energy consumption data acquisition terminal | |
| CN201548279U (en) | Low power consumption flow rate and pressure real-time monitoring system | |
| CN202534055U (en) | Prepayment electric energy meter site detector | |
| Ferrigno et al. | Visual sensors for remote metering in public networks | |
| CN104833954A (en) | Mine personnel security positioning system | |
| CN210244400U (en) | Automatic reading device of passive self-generating instrument | |
| Ali et al. | Single phase GSM based wireless energy metering with user notification system | |
| CN206387790U (en) | Air quality data collection and radio transmitting device under a kind of forest environment | |
| CN202939193U (en) | Single-phase intelligent multi-user remote cost control electric energy meter | |
| CN105529826A (en) | PXI bus-based portable intelligent simulation unit | |
| CN201837868U (en) | Intelligent network measurement and control instrument | |
| CN205261238U (en) | Gas pipe network leaks transient pressure ripples detection and analysis system | |
| CN105425697A (en) | Dry desulfurization waste gas treatment facility monitoring terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151125 Termination date: 20160808 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |