CN202421486U - Handheld intelligent signal generator - Google Patents
Handheld intelligent signal generator Download PDFInfo
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- CN202421486U CN202421486U CN2012200326360U CN201220032636U CN202421486U CN 202421486 U CN202421486 U CN 202421486U CN 2012200326360 U CN2012200326360 U CN 2012200326360U CN 201220032636 U CN201220032636 U CN 201220032636U CN 202421486 U CN202421486 U CN 202421486U
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Abstract
The utility model relates to a handheld intelligent signal generator. The handheld intelligent signal generator is composed of a light touch switch circuit A, a central processing unit B, a reset circuit C, a crystal oscillator circuit D, a matrix key circuit E, a nixie tube display circuit F, a D/A (digital-to-analog) conversion and operational amplification circuit G and a power and current protection and output circuit H, wherein a main circuit is composed of the central processing unit B, the D/A conversion and operational amplification circuit F and the power and current protection and output circuit H; the nixie tube display circuit G provides a digital display function; and the reset circuit C and the crystal oscillator circuit D provides necessary support for a single processing unit to work. The handheld intelligent signal generator has the advantages of simplicity in opeartion, dual purposes on one machine, small volume, reasonable structure, convenience for carrying and one-handed operation, and is capable of meeting demands on debugging, detection maintenance and check of various field instruments in laboratory and industry.
Description
Technical field:
The utility model provides a kind of digital display type, intelligentized industrial instrument tester, specifically a kind of handheld-type intelligent signal generator.
Background technology:
Though the signal generator kind of prior art is a lot; But in use ubiquitous deficiency is a circuit design can't bear rationally, overall volume is excessive, use ac power supply, and being mainly reflected in The traditional signal generator is desktop designs, and volume is bigger than normal; When field adjustable, verification or the detection that is used for industrial instrument and automatic control system safeguarded; Carry difficulty, on power supply, adopt ac power supply, extremely not convenient; And the protection that lacks voltage and current overload, thereby exist the result of use of signal generator and bigger influence is arranged serviceable life.
Summary of the invention:
The purpose of the utility model mainly is to overcome the shortage of The traditional signal generator in above design, provides a kind of circuit design more reasonable, is easy to carry about with one; Low-power consumption, debugging is convenient, high precision output; Protect more perfect, the novel intelligent handheld-type intelligent signal generator of longer service life.
The technical scheme of the utility model realizes by following mode; Its structure of handheld-type intelligent signal generator is made up of touch-switch circuit A, central processor unit B, reset circuit C, crystal oscillating circuit D, matrix press-key circuit E, charactron display circuit F, D/A conversion and discharge circuit G, power supply and current protection and output circuit H; Central processor unit B, D/A conversion and discharge circuit F, power supply and current protection and output circuit H form main circuit; The charactron display circuit G provide digital display function; Reset circuit C, crystal oscillating circuit D are that single-chip microcomputer processing unit F work provides necessary support, wherein:
Touch-switch circuit A is made up of resistance R 2-R5, capacitor C 4 and C5, button K1, diode D1, triode Q1 and Q2; The emitter of triode Q1 meets power supply+5V; Resistance R 2 also connects between the emitter and base stage of triode Q1, and the base stage crosstalk of Q1 resistance R3 connects the emitter of triode Q2, the grounded collector of triode Q2; Capacitor C 5 also connects base stage and the collector of triode Q2; K switch 1 capacitor C 4 is serially connected between the base stage and collector of triode Q2, and diode D1 resistance R 5 is attempted by the emitter of triode Q2 and the tie point of K switch 1 capacitor C 4, and the two ends of resistance R 4 connect the collector of triode Q1 and the base stage of triode Q2 respectively;
Central processor unit B is made up of integrated circuit U1; 44 pin of integrated circuit U1 connect the collector of triode Q1; The 22 pin ground connection of integrated circuit U1; U1 7,8,9,6, the 11-17 pin connects the 2-10 pin of integrated circuit U3 respectively, 18,2,28 pin of U1 connect the 1-3 pin of integrated circuit U2 respectively, 10 pin of U1 connect the tie point of capacitor C 1 resistance R 1;
Reset circuit C is made up of capacitor C 1 and resistance R 1, between capacitor C 1 and resistance R 1 serial connection 5V power supply and the ground wire;
Crystal oscillating circuit D is made up of crystal oscillator XT1, capacitor C 2, C3, and the two ends of crystal oscillator XT1 also connect 20 pin and 21 pin of integrated circuit U1, the two ends of capacitor C 2, C3 serial connection crystal oscillator XT1, the tie point ground connection of capacitor C 2, C3;
Matrix press-key circuit E is by resistance R 6-R10, and button K2-K6 forms, and 29,31,33,35,37,39 pin of integrated circuit U1 are crosstalk resistance R11 K switch 7 respectively; Resistance R 10 K switch 6; Resistance R 9 K switch 5; Resistance R 8 K switch 4; Resistance R 3 K switch 3; Resistance R 6 K switch 2 ground connection;
Charactron display circuit F is made up of resistance R 12-R15, integrated circuit U3 and U5; Wherein the 12-19 pin of integrated circuit U3 connects 3,510,1,2,4,7 and 11 pin of integrated circuit U5 respectively; 12,9,8,6 pin of integrated circuit U5 are crosstalk resistance R12, R13, R14, R15 ground connection respectively, and 11 pin of integrated circuit U3 meet power supply+5V;
D/A conversion and discharge circuit G are made up of integrated circuit U2, integrated circuit U4A and U4B, resistance R 16-R23, diode D2-D5, three plate pipe Q3 and plug connector J1, and wherein 7 pin of integrated circuit U2 connect 12 pin of integrated circuit U4B, and 6 pin of integrated circuit U2 are connected respectively with 8 pin+2.1V ,+the 5V power supply; The 5 pin ground connection of integrated circuit U2; The 4 pin crosstalks resistance R16 of integrated circuit U2 connects 3 pin of integrated circuit U4A, and the 3 pin crosstalks resistance R19 of integrated circuit U4A, R21, R22, R17 are connected in series ground, the 2 pin connecting resistance R22 of integrated circuit U4A, the tie point of R17; 4 pin meet power supply+10V; 11 pin ground connection, 1 pin crosstalk resistance R20 connects the base stage of triode Q3, and the collector of triode Q3 meets power supply+10V; The emitter connecting resistance R21 of triode Q3, the tie point of R22; Diode D2 is connected between the emitter of 1 pin and triode Q3 of integrated circuit U4A, and resistance R 23 also connects between 13 pin and 14 pin of integrated circuit U4B, and 13 pin of integrated circuit U4B are series resistor R18 ground connection also;
Power supply and current protection and output circuit H are made up of resettable fuse F1 and F2, TVS overvoltage protection pipe D3 and D4, diode D5, connector J1; The 1 pin string diode D5 fusible link F1 connecting resistance R21 of connector J1; 2 pin ground connection; 14 pin of 3 pin strings fusing wire connection integrated power U4B, 2,3 pin of TVS overvoltage protection pipe D4 and connector J1 also connect, and TVS overvoltage protection pipe D3 string fusible link F1 diode D5 connects 1 pin of connector J1.
The utility model has the advantages that: precision is high, volume is little, stable and reliable for performance, and the field adjustable, verification and the detection that are used for industrial instrument and automatic control system are safeguarded, also can be used for the calibration of Laboratory Instruments instrument.Voltage output: 0-10V, trueness error＜± 0.1%, electric current output: 0-20mA, trueness error＜± 0.1%.
Simple to operate, dual-use, advantages of small volume, rational in infrastructure, easy to carry are fit to one-handed performance, and draw and insert-type is provided lithium battery for oneself; Be prone to change;, and have digital the demonstration, also can clear reading in the place of dim light etc. characteristics; The perfect simultaneously protective capability of signal generator under the over-voltage and over-current situation, be convenient to satisfy laboratory and industrial various field instruments debugging, detect and safeguard and the verification requirement.
Description of drawings:
Accompanying drawing 2 is the circuit theory diagrams of intelligent hand-held signal generator
Embodiment:
Below in conjunction with accompanying drawing the intelligent hand-held signal generator unit of the utility model is done following the detailed description.
Like accompanying drawing 1, shown in 2; The utility model is made up of touch-switch circuit A, central processor unit B, reset circuit C, crystal oscillating circuit D, matrix press-key circuit E, charactron display circuit F, D/A conversion and discharge circuit G, power supply and current protection and output circuit H; Central processor unit B, D/A conversion and discharge circuit F, power supply and current protection and output circuit H form main circuit; The charactron display circuit G provide digital display function, and reset circuit C, crystal oscillating circuit D are that single-chip microcomputer processing unit F work provides necessary support wherein:
Touch-switch circuit A is made up of resistance R 2-R5, capacitor C 4 and C5, button K1, diode D1, triode Q1 and Q2; The emitter of triode Q1 meets power supply+5V; Resistance R 2 also connects between the emitter and base stage of triode Q1, and the base stage crosstalk of Q1 resistance R3 connects the emitter of triode Q2, the grounded collector of triode Q2; Capacitor C 5 also connects base stage and the collector of triode Q2; K switch 1 capacitor C 4 is serially connected between the base stage and collector of triode Q2, and diode D1 resistance R 5 is attempted by the emitter of triode Q2 and the tie point of K switch 1 capacitor C 4, and the two ends of resistance R 4 connect the collector of triode Q1 and the base stage of triode Q2 respectively;
Central processor unit B is made up of integrated circuit U1; 44 pin of integrated circuit U1 connect the collector of triode Q1; The 22 pin ground connection of integrated circuit U1; U1 7,8,9,6, the 11-17 pin connects the 2-10 pin of integrated circuit U3 respectively, 18,2,28 pin of U1 connect the 1-3 pin of integrated circuit U2 respectively, 10 pin of U1 connect the tie point of capacitor C 1 resistance R 1;
Reset circuit C is made up of capacitor C 1 and resistance R 1, between capacitor C 1 and resistance R 1 serial connection 5V power supply and the ground wire;
Crystal oscillating circuit D is made up of crystal oscillator XT1, capacitor C 2, C3, and the two ends of crystal oscillator XT1 also connect 20 pin and 21 pin of integrated circuit U1, the two ends of capacitor C 2, C3 serial connection crystal oscillator XT1, the tie point ground connection of capacitor C 2, C3;
Matrix press-key circuit E is by resistance R 6-R10, and button K2-K6 forms, and 29,31,33,35,37,39 pin of integrated circuit U1 are crosstalk resistance R11 K switch 7 respectively; Resistance R 10 K switch 6; Resistance R 9 K switch 5; Resistance R 8 K switch 4; Resistance R 3 K switch 3; Resistance R 6 K switch 2 ground connection;
Charactron display circuit F is made up of resistance R 12-R15, integrated circuit U3 and U5; Wherein the 12-19 pin of integrated circuit U3 connects 3,510,1,2,4,7 and 11 pin of integrated circuit U5 respectively; 12,9,8,6 pin of integrated circuit U5 are crosstalk resistance R12, R13, R14, R15 ground connection respectively, and 11 pin of integrated circuit U3 meet power supply+5V;
D/A conversion and discharge circuit G are made up of integrated circuit U2, integrated circuit U4A and U4B, resistance R 16-R23, diode D2-D5, triode Q3 and plug connector J1, and wherein 7 pin of integrated circuit U2 connect 12 pin of integrated circuit U4B, and 6 pin of integrated circuit U2 are connected respectively with 8 pin+2.1V ,+the 5V power supply; The 5 pin ground connection of integrated circuit U2; The 4 pin crosstalks resistance R16 of integrated circuit U2 connects 3 pin of integrated circuit U4A, and the 3 pin crosstalks resistance R19 of integrated circuit U4A, R21, R22, R17 are connected in series ground, the 2 pin connecting resistance R22 of integrated circuit U4A, the tie point of R17; 4 pin meet power supply+10V; 11 pin ground connection, 1 pin crosstalk resistance R20 connects the base stage of triode Q3, and the collector of triode Q3 meets power supply+10V; The emitter connecting resistance R21 of triode Q3, the tie point of R22; Diode D2 is connected between the emitter of 1 pin and triode Q3 of integrated circuit U4A, and resistance R 23 also connects between 13 pin and 14 pin of integrated circuit U4B, and 13 pin of integrated circuit U4B are series resistor R18 ground connection also;
Power supply and current protection and output circuit H are made up of resettable fuse F1 and F2, TVS overvoltage protection pipe D3 and D4, diode D5, connector J1; The 1 pin string diode D5 fusible link F1 connecting resistance R21 of connector J1; 2 pin ground connection; 14 pin of 3 pin strings fusing wire connection integrated power U4B, 2,3 pin of TVS overvoltage protection pipe D4 and connector J1 also connect, and TVS overvoltage protection pipe D3 string fusible link F1 diode D5 connects 1 pin of connector J1.Ultimate principle is following:
The utility model adopts lithium battery power supply, voltage output: 0-10V, and electric current output: 0-20mA, circuit structure such as theory diagram are shown in Figure 1.Adopt the touch-switch circuit, for entire circuit provides direct supply, it utilizes the characteristic of triode, through button K1 control capacitance C4 charging and discharge process, controls the voltage status of the base stage of triode Q1 and Q2, thereby reaches the purpose of the equipment of opening or closing.
The intelligent signal generator is to be that integrated circuit U1 is a core with central processing unit; Based on high sensitivity and the controllability of central processing unit to digital signal; Through receiving the digital signal of rectangle button K2-K7; At charactron is that integrated circuit U5 shows the curtage value that institute will export, and central processing unit is through the analysis and the processing of data, and carrying out computing, to export digital signal be integrated circuit U2 to D/A converter.The auxiliary unit circuit is reset circuit and crystal oscillating circuit, resets reliably and clock for its operate as normal provides.
The D/A change-over circuit is a core with integrated circuit U2 promptly; Integrated circuit U2 is a kind of two-way able to programme 12 figure place mould conversion chips that have the input of buffering benchmark; Output voltage range is the twice of reference voltage; D/A converter receives 16 words that are used to programme and produces simulation output, and Output Voltage Formula is:
2(VREFIN)CODE/4096
Calculate the analog quantity curtage value of conversion according to the D/A converter formula, send transmitter to through D/A converter two-way output pin.Transmitter is to be the discharge circuit of core composition with integrated circuit U4A and U4B; According to the short empty disconnected rule of void; Voltage signal finally is converted into current signal or voltage signal is carried out amplifier, is connector J1 output 4-20mA electric current or 0-10V voltage through output circuit.The current/voltage holding circuit is made up of TVS protection tube D3, D4, diode D5, resettable fuse F1, F2, F3, makes intelligent hand-held signal generator in use obtain better protection.
Claims (1)
1. handheld-type intelligent signal generator; It is characterized in that; Comprise touch-switch circuit A, central processor unit B, reset circuit C, crystal oscillating circuit D, matrix press-key circuit E, charactron display circuit F, D/A conversion and discharge circuit G, power supply and current protection and output circuit H, wherein:
Touch-switch circuit A is made up of resistance R 2-R5, capacitor C 4 and C5, button K1, diode D1, triode Q1 and Q2; The emitter of triode Q1 meets power supply+5V; Resistance R 2 also connects between the emitter and base stage of triode Q1, and the base stage crosstalk of Q1 resistance R3 connects the emitter of triode Q2, the grounded collector of triode Q2; Capacitor C 5 also connects base stage and the collector of triode Q2; K switch 1 capacitor C 4 is serially connected between the base stage and collector of triode Q2, and diode D1 resistance R 5 is attempted by the emitter of triode Q2 and the tie point of K switch 1 capacitor C 4, and the two ends of resistance R 4 connect the collector of triode Q1 and the base stage of triode Q2 respectively;
Central processor unit B is made up of integrated circuit U1; 44 pin of integrated circuit U1 connect the collector of triode Q1; The 22 pin ground connection of integrated circuit U1; U1 7,8,9,6, the 11-17 pin connects the 2-10 pin of integrated circuit U3 respectively, 18,2,28 pin of U1 connect the 1-3 pin of integrated circuit U2 respectively, 10 pin of U1 connect the tie point of capacitor C 1 resistance R 1;
Reset circuit C is made up of capacitor C 1 and resistance R 1, between capacitor C 1 and resistance R 1 serial connection 5V power supply and the ground wire;
Crystal oscillating circuit D is made up of crystal oscillator XT1, capacitor C 2, C3, and the two ends of crystal oscillator XT1 also connect 20 pin and 21 pin of integrated circuit U1, the two ends of capacitor C 2, C3 serial connection crystal oscillator XT1, the tie point ground connection of capacitor C 2, C3;
Matrix press-key circuit E is by resistance R 6-R10, and button K2-K6 forms, and 29,31,33,35,37,39 pin of integrated circuit U1 are crosstalk resistance R11 K switch 7 respectively; Resistance R 10 K switch 6; Resistance R 9 K switch 5; Resistance R 8 K switch 4; Resistance R 3 K switch 3; Resistance R 6 K switch 2 ground connection;
Charactron display circuit F is made up of resistance R 12-R15, integrated circuit U3 and U5; Wherein the 12-19 pin of integrated circuit U3 connects 3,510,1,2,4,7 and 11 pin of integrated circuit U5 respectively; 12,9,8,6 pin of integrated circuit U5 are crosstalk resistance R12, R13, R14, R15 ground connection respectively, and 11 pin of integrated circuit U3 meet power supply+5V;
D/A conversion and discharge circuit G are made up of integrated circuit U2, integrated circuit U4A and U4B, resistance R 16-R23, diode D2-D5, triode Q3 and plug connector J1, and wherein 7 pin of integrated circuit U2 connect 12 pin of integrated circuit U4B, and 6 pin of integrated circuit U2 are connected respectively with 8 pin+2.1V ,+the 5V power supply; The 5 pin ground connection of integrated circuit U2; The 4 pin crosstalks resistance R16 of integrated circuit U2 connects 3 pin of integrated circuit U4A, and the 3 pin crosstalks resistance R19 of integrated circuit U4A, R21, R22, R17 are connected in series ground, the 2 pin connecting resistance R22 of integrated circuit U4A, the tie point of R17; 4 pin meet power supply+10V; 11 pin ground connection, 1 pin crosstalk resistance R20 connects the base stage of triode Q3, and the collector of triode Q3 meets power supply+10V; The tie point of the emitter connecting resistance R21R22 of triode Q3; Diode D2 is connected between the emitter of 1 pin and triode Q3 of integrated circuit U4A, and resistance R 23 also connects between 13 pin and 14 pin of integrated circuit U4B, and 13 pin of integrated circuit U4B are series resistor R18 ground connection also;
Power supply and current protection and output circuit H are made up of resettable fuse F1 and F2, TVS overvoltage protection pipe D3 and D4, diode D5, connector J1; The 1 pin string diode D5 fusible link F1 connecting resistance R21 of connector J1; 2 pin ground connection; 14 pin of 3 pin strings fusing wire connection integrated power U4B, 2,3 pin of TVS overvoltage protection pipe D4 and connector J1 also connect, and TVS overvoltage protection pipe D3 string fusible link F1 diode D5 connects 1 pin of connector J1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200326360U CN202421486U (en) | 2012-02-02 | 2012-02-02 | Handheld intelligent signal generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200326360U CN202421486U (en) | 2012-02-02 | 2012-02-02 | Handheld intelligent signal generator |
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|---|---|
| CN202421486U true CN202421486U (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200326360U Expired - Fee Related CN202421486U (en) | 2012-02-02 | 2012-02-02 | Handheld intelligent signal generator |
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| CN (1) | CN202421486U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590776A (en) * | 2012-02-02 | 2012-07-18 | 高鹤 | Handheld intelligent signal generator |
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2012
- 2012-02-02 CN CN2012200326360U patent/CN202421486U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590776A (en) * | 2012-02-02 | 2012-07-18 | 高鹤 | Handheld intelligent signal generator |
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Legal Events
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| 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: 20120905 Termination date: 20160202 |
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| CF01 | Termination of patent right due to non-payment of annual fee |