CN105203714A - Pumping type multi-parameter determining device - Google Patents
Pumping type multi-parameter determining device Download PDFInfo
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- CN105203714A CN105203714A CN201510650470.7A CN201510650470A CN105203714A CN 105203714 A CN105203714 A CN 105203714A CN 201510650470 A CN201510650470 A CN 201510650470A CN 105203714 A CN105203714 A CN 105203714A
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Abstract
The invention relates to a pumping type multi-parameter determining device and belongs to the technical field of mining detection equipment. The pumping type multi-parameter determining device comprises a singlechip control unit, a gas detecting unit, a power supply control circuit, a display control circuit, an aspirator pump control circuit, a key control circuit, an alarm circuit and a power supply unit, wherein the gas detecting unit comprises a carbon monoxide detecting circuit, a hydrogen sulfide detecting circuit, a methane detecting circuit and an oxygen detecting circuit, and the singlechip control unit is respectively connected with the carbon monoxide detecting circuit, the hydrogen sulfide detecting circuit, the methane detecting circuit, the oxygen detecting circuit, the power supply control circuit, the display control circuit, the aspirator pump control circuit, the key control circuit, the alarm circuit and the power supply unit. The pumping type multi-parameter determining device has the advantages that the concentrations of four gases, namely, carbon monoxide, hydrogen sulfide, methane and oxygen, can be simultaneously detected; the cost for gas detection under a coal mine environment is reduced; the detection precision is high; the information, such as, gas concentration, time and internal voltage, can be displayed in real time; the function is complete; the intelligent degree is high; the electric power is saved.
Description
Technical field
The invention belongs to mining checkout equipment technical field, be specifically related to a kind of pump suction type multi-parameter measuring device.
Background technology
Because the particular surroundings of coal mining, colliery industry is the high risk industries in industrial and mining enterprises of China always.Coal mine, due to environment, inevitably has the harmful gases such as methane, carbon monoxide and sulfuretted hydrogen and produces.When methane content exceeding preset limit, explosion of coal mines can be caused; When carbon monoxide and concentration of hydrogen sulfide transfinite, oxygen concentration reach lower bound time, personnel's expiratory dyspnea under ore deposit can be made, threat to life safety.In order to effectively ensure the personal safety of lower ore deposit personnel and ensure that coal mining enterprise keeps the safety in production normally, more and more higher to the performance requirement of mining gas detecting instrument in the industry, no longer be satisfied with the detecting instrument that can only detect pure gas, be also no longer satisfied with the instrument of function singleness.Initial mining gas detecting instrument adopts natural diffuseness formula, and sensing range is little, and precision is low, and function is few, can only detect gas concentration value, does not possess display and warning function.In order to improve gas detect precision, existing apparatus for determination of gas starts to adopt pump suction type, but the domestic pump suction type analyzer related to for gas detect can detect multiple harmful gas at present simultaneously, particularly can the portable instrument of Simultaneously test methane and sulfuretted hydrogen still rare.When needs detect two or more gas simultaneously, more than two instruments must be carried, not only can cause and use inconvenience, testing cost also can be caused to increase.
In addition, along with the high speed development of coal industry, lithium battery is widely applied in coal mine equipment.Portable mining pump suction gas analyzer mostly adopts lithium battery to power.The weak point of mining lithium battery is the requirement of charging set harsher, higher to the requirement of protection circuit.When analyzer and charging set be directly electrically connected charge time, due to voltage fluctuation, leakage current or other electric power factors, there is electric spark sometimes, the major accident such as also to set off an explosion time serious occurs, therefore mine pump suction apparatus for determination of gas does not allow directly to charge in down-hole, needs timing to send into charging house charging.How to ensure the stable output of lithium battery, improve the serviceable life of lithium battery, how to reduce power consumption, improve the flying power of lithium battery, a problem very important when being also current pump suction type analyzer R & D design.
In view of above-mentioned prior art, the applicant has done useful design, and technical scheme described below produces under this background.
Summary of the invention
The object of the present invention is to provide a kind of pump suction type multi-parameter measuring device, the concentration of energy Simultaneously test multiple gases, controlled by Intelligent Single-Chip Based, accuracy of detection is high, complete function, and energy saving.
The object of the invention is to reach like this, a kind of pump suction type multi-parameter measuring device, comprise single chip control unit, gas detection cell, power control circuit, display control circuit, asepwirator pump control circuit, key control circuit, warning circuit and power supply unit, it is characterized in that: described gas detection cell comprises Carbon Monoxide Detection circuit, sulfurated hydrogen detection circuit, CH_4 detection circuit and oxygen detection circuit, described single chip control unit respectively with Carbon Monoxide Detection circuit, sulfurated hydrogen detection circuit, CH_4 detection circuit, oxygen detection circuit, power control circuit, display control circuit, asepwirator pump control circuit, key control circuit, warning circuit and power supply unit connect.
In a specific embodiment of the present invention, described single chip control unit comprises single-chip microcomputer U1, first electric capacity C1, second electric capacity C2, 3rd electric capacity C3, 4th electric capacity C4 and crystal oscillator X1, described single-chip microcomputer U1 adopts PLC16F886, one end of the first electric capacity C1, one end of second electric capacity C2 and 20 pin of single-chip microcomputer U1 connect the first constant voltage dc source V1 jointly, one end of 3rd electric capacity C3 is connected 11 pin of single-chip microcomputer U1 jointly with one end of crystal oscillator X1, one end of 4th electric capacity C4 is connected 12 pin of single-chip microcomputer U1 jointly with the other end of crystal oscillator X1,2 of single-chip microcomputer U1, power control circuit described in 3 pin connect, the oxygen detection circuit described in 4 pin connections of single-chip microcomputer U1,5 pin of single-chip microcomputer U1 connect the Carbon Monoxide Detection circuit described in 7 pin connections of the 3rd constant voltage dc source V3, single-chip microcomputer U1,10 of single-chip microcomputer U1, power supply unit described in 16 pin connect, the sulfurated hydrogen detection circuit described in 21 pin connections of single-chip microcomputer U1, the CH_4 detection circuit described in 22 pin connections of single-chip microcomputer U1,23 of single-chip microcomputer U1, 24, 14, 15, display control circuit described in 18 pin connect, the warning circuit described in 13 pin connections of single-chip microcomputer U1, the asepwirator pump control circuit described in 16 pin connections of single-chip microcomputer U1, the key control circuit described in 25 ~ 28 pin connections of single-chip microcomputer U1, the other end of the first electric capacity C1, the other end of the second electric capacity C2, the other end of the 3rd electric capacity C3, the other end of the 4th electric capacity C4 and 8 of single-chip microcomputer U1, 19 pin common grounds.
In another specific embodiment of the present invention, described Carbon Monoxide Detection circuit comprises carbon monoxide probe S1, first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, 5th resistance R5, 6th resistance R6, 7th resistance R7, 8th resistance R8, 9th resistance R9, tenth resistance R10, 11 resistance R11, 12 resistance R12, 5th electric capacity C5, 6th electric capacity C6, 7th electric capacity C7, 8th electric capacity C8, 9th electric capacity C9, first operational amplifier U1A, second operational amplifier U1B and the 3rd operational amplifier U2B, described carbon monoxide probe S1 adopts C0-AF, the first described operational amplifier U1A, second operational amplifier U1B and the 3rd operational amplifier U2B adopts LM358, carbon monoxide probe 1 pin of S1 is connected with 1 pin of one end of the 5th electric capacity C5 and the first operational amplifier U1A, the other end of the 5th electric capacity C5 is connected with one end of one end of the first resistance R1 and the second resistance R2, the other end of the first resistance R1 connects 2 pin of carbon monoxide probe S1, 3 pin of carbon monoxide probe S1 connect one end of the 5th resistance R5, the other end of the 5th resistance R5 and one end of the 4th resistance R4, one end of 6th electric capacity C6 and 6 pin of the second operational amplifier U1B connect, the other end of the 4th resistance R4 and the other end of the 6th electric capacity C6, 7 pin of the second operational amplifier U1B and one end of the 7th resistance R7 connect, 5 pin of the second operational amplifier U1B connect one end of the 6th resistance R6, the other end of the 7th resistance R7 is connected with 5 pin of one end of the 8th resistance R8 and the 3rd operational amplifier U2B, 6 pin of the 3rd operational amplifier U2B and one end of the 9th resistance R9, one end of tenth resistance R10 and one end of the 9th electric capacity C9 connect, the other end of the tenth resistance R10 and the other end of the 9th electric capacity C9, 7 pin of the 3rd operational amplifier U2B and one end of the 11 resistance R11 connect, the other end and one end of the 12 resistance R12 of 11 resistance R11 are connected 7 pin of described single-chip microcomputer U1 jointly, the other end of the second resistance R2 connects 2 pin of the first operational amplifier U1A, 3 pin of the first operational amplifier U1A connect one end of the 3rd resistance R3,8 pin of the first operational amplifier U1A, one end of 7th electric capacity C7, one end of 8th electric capacity C8 and the other end of the 12 resistance R12 connect the 3rd constant voltage dc source V3 jointly, and 4 pin of the first operational amplifier U1A connect the 4th constant voltage dc source V4, the other end of the 3rd resistance R3, the other end of the 7th electric capacity C7, the other end of the 8th electric capacity C8, the other end of the 6th resistance R6, the other end of the 8th resistance R8 and the other end common ground of the 9th resistance R9.
In another specific embodiment of the present invention, described CH_4 detection circuit comprises black-and-white component S2, 13 resistance R13, 14 resistance R14, 15 resistance R15, 16 resistance R16, 17 resistance R17, 18 resistance R18, 19 resistance R19, tenth electric capacity C10, 11 electric capacity C11 and four-operational amplifier U3B, described black-and-white component S2 adopts MJC4/2.9J, four-operational amplifier U3B adopts LM358, 2 pin of black-and-white component S2 connect one end of the 16 resistance R16, the other end of the 16 resistance R16 and one end of the tenth electric capacity C10, one end of 17 resistance R17 and 5 pin of four-operational amplifier U3B connect, 6 pin of four-operational amplifier U3B and one end of the 15 resistance R15, one end of 11 electric capacity C11 and one end of the 18 resistance R18 connect, the other end of the 15 resistance R15 is connected with one end of the 13 resistance R13 and one end of the 14 resistance R14, the other end of the 11 electric capacity C11 and the other end of the 18 resistance R18, 7 pin of four-operational amplifier U3B and one end of the 19 resistance R19 connect, 22 pin of the single-chip microcomputer U1 described in other end connection of the 19 resistance R19, 1 pin of black-and-white component S2 is connected the second constant voltage dc source V2 jointly with one end of the 13 resistance R13, 3 pin of black-and-white component S2, the other end of the 14 resistance R14, the other end of the tenth electric capacity C10 and the other end common ground of the 17 resistance R17.
In another specific embodiment of the present invention, described oxygen detection circuit comprises oxygen measurement probe S3, 20 resistance R20, 21 resistance R21, 22 resistance R22, 23 resistance R23, 12 electric capacity C12 and the 5th operational amplifier U4A, described oxygen measurement probe S3 adopts 02-A2, the 5th described operational amplifier U4A adopts LM358, one end of oxygen measurement probe S3 connects one end of the 20 resistance R20, the other end of the 20 resistance R20 and one end of the 12 electric capacity C12, one end of 22 resistance R22 and 2 pin of the 5th operational amplifier U4A connect, the other end of the 12 electric capacity C12 and the other end of the 22 resistance R22, 1 pin of the 5th operational amplifier U4A and one end of the 23 resistance R23 connect, 4 pin of the single-chip microcomputer U1 described in other end connection of the 23 resistance R23, 3 pin of the 5th operational amplifier U4A connect one end of the 21 resistance R21, 4 pin of the 5th operational amplifier U4A connect the 3rd constant voltage dc source V3, the other end of oxygen measurement probe S3, the other end of the 21 resistance R21 and the 8 pin common grounds of the 5th operational amplifier U4A.
Also have in a specific embodiment of the present invention, described power control circuit comprises charging connector J1, diode D1, 24 resistance R24, 25 resistance R25, 26 resistance R26, 27 resistance R27 and battery E, described battery E is the potassium manganate battery of YT183650 type, one end of charging connector J1 is connected with one end of the positive pole of diode D1 and the 24 resistance R24, the other end and one end of the 25 resistance R25 of 24 resistance R24 are connected 2 pin of described single-chip microcomputer U1 jointly, one end and one end of the 27 resistance R27 of 26 resistance R26 are connected 3 pin of single-chip microcomputer U1 jointly, the negative pole of diode D1 is connected with the other end of the 26 resistance R26 and the positive pole of battery E, and export the first direct supply VDD, the other end of charging connector J1, the other end of the 25 resistance R25, the other end of the 27 resistance R27 and the negative pole common ground of battery E.
More of the present invention and in a specific embodiment, described display control circuit comprises LCD display U5, first triode Q1 and the 28 resistance R28, described LCD display U5 adopts AOXPOO63A-00, 15 pin of the single-chip microcomputer U1 described in the connection of one end of the 28 resistance R28, the other end of the 28 resistance R28 connects the base stage of the first triode Q1, the collector of the first triode Q1 connects the K end of LCD display U5, the VLCD end of LCD display U5 connects 18 pin of single-chip microcomputer U1, the DATA end of LCD display U5 connects 14 pin of single-chip microcomputer U1, LCD display U5 /WR end connects 23 pin of single-chip microcomputer U1, LCD display U5 /CS end connects 24 pin of single-chip microcomputer U1, the A of LCD display U5 holds connection first constant voltage dc source V1, the VSS end of LCD display U5 and the emitter common ground of the first triode Q1.
In an of the present invention and then specific embodiment, described asepwirator pump control circuit comprises bidirectional triode thyristor ZD, switch contacts J2, asepwirator pump joint J3, first stabilized voltage supply chip U6, second triode Q2, 29 resistance R29, 30 resistance R30, 13 electric capacity C13 and micro air pump M, the first described stabilized voltage supply chip U6 adopts TPS79330, micro air pump M adopts GMPA-1, described switch contacts J2 is external to be opened, stop button, 2 pin of switch contacts J2 connect the control pole of bidirectional triode thyristor ZD, the first anode of bidirectional triode thyristor ZD is connected with one end of 3 pin of switch contacts J2 and the 29 resistance R29, the other end of the 29 resistance R29 connects the base stage of the second triode Q2, 16 pin of the single-chip microcomputer U1 described in emitter connection of the second triode Q2, the collector of the second triode Q2 is connected with 3 pin of one end of the 30 resistance R30 and the first stabilized voltage supply chip U6, 5 pin of the first stabilized voltage supply chip U6 are connected with one end of the 13 electric capacity C13 and 1 pin of asepwirator pump joint J3, 1 of asepwirator pump joint J3, 2 pin are connected with the two ends of micro air pump M respectively, 1 pin of the first stabilized voltage supply chip U6 meets the second direct supply VCC, 1 pin of switch contacts J2, the second anode of bidirectional triode thyristor ZD, the other end of the 30 resistance R30, the other end of the 13 electric capacity C13, 2 pin of the first stabilized voltage supply chip U6 and the 2 pin common grounds of asepwirator pump joint J3.
Of the present invention again more and in a specific embodiment, described key control circuit comprises the first button K1, second button K2, 3rd button K3 and the 4th button K4, 26 pin of the single-chip microcomputer U1 described in the connection of one end of the first described button K1, one end of second button K2 connects 27 pin of single-chip microcomputer U1, one end of 3rd button K3 connects 25 pin of single-chip microcomputer U1, one end of 4th button K4 connects 28 pin of single-chip microcomputer U1, the other end of the first button K1, the other end of the second button K2, the other end of the 3rd button K3 and the other end common ground of the 4th button K4, described warning circuit comprises the 31 resistance R31, the 3rd triode Q3 and hummer B, 13 pin of the single-chip microcomputer U1 described in the connection of one end of the 31 described resistance R31, the other end of the 31 resistance R31 connects the base stage of the 3rd triode Q3, the collector of the 3rd triode Q3 connects one end of hummer B, the other end of hummer B connects the first direct supply VDD, the grounded emitter of the 3rd triode Q3.
In an again of the present invention and then specific embodiment, described power supply unit comprises the first power supply stabilization circuit, second source mu balanced circuit, 3rd power supply stabilization circuit and the 4th power supply stabilization circuit, the first described power supply stabilization circuit comprises the second stabilized voltage supply chip U7, 14 electric capacity C14 and the 15 electric capacity C15, second stabilized voltage supply chip U7 adopts TPS79330, 1 of second stabilized voltage supply chip U7, one end of 3 pin and the 14 electric capacity C14 connects the first direct supply VDD jointly, 5 pin of the second stabilized voltage supply chip U7 are connected with one end of the 15 electric capacity C15, and export the first constant voltage dc source V1, the other end of the 14 electric capacity C14, the other end of the 15 electric capacity C15 and the 2 pin common grounds of the second stabilized voltage supply chip U7, described second source mu balanced circuit comprises the 3rd stabilized voltage supply chip U8, 16 electric capacity C16 and the 17 electric capacity C17, 3rd stabilized voltage supply chip U8 adopts TPS79328, 1 pin of the 3rd stabilized voltage supply chip U8 is connected the first direct supply VDD jointly with one end of the 16 electric capacity C16, 5 pin of the 3rd stabilized voltage supply chip U8 are connected with one end of the 17 electric capacity C17, and export the second constant voltage dc source V2, 16 pin of the single-chip microcomputer U1 described in 3 pin connections of the 3rd stabilized voltage supply chip U8, the other end of the 16 electric capacity C16, the other end of the 17 electric capacity C17 and the 2 pin common grounds of the 3rd stabilized voltage supply chip U8, the 3rd described power supply stabilization circuit comprises the 4th stabilized voltage supply chip U9, 18 electric capacity C18 and the 19 electric capacity C19, 4th stabilized voltage supply chip U9 adopts TPS79328, 1 pin of the 4th stabilized voltage supply chip U9 is connected the first direct supply VDD jointly with one end of the 18 electric capacity C18, 5 pin of the 4th stabilized voltage supply chip U9 are connected with one end of the 19 electric capacity C19, and export the 3rd constant voltage dc source V3, 10 pin of the single-chip microcomputer U1 described in 3 pin connections of the 4th stabilized voltage supply chip U9, the other end of the 18 electric capacity C18, the other end of the 19 electric capacity C19 and the 2 pin common grounds of the 4th stabilized voltage supply chip U9, the 4th described power supply stabilization circuit comprises the 5th stabilized voltage supply chip U10, 20 electric capacity C20 and the 21 electric capacity C21, 5th stabilized voltage supply chip U10 adopts MAX829, 2 pin of the 5th stabilized voltage supply chip U10 connect the 3rd constant voltage dc source V3, 5 pin of the 5th stabilized voltage supply chip U10 connect one end of the 20 electric capacity C20, the other end of the 20 electric capacity C20 connects 3 pin of the 5th stabilized voltage supply chip U10, 1 pin of the 5th stabilized voltage supply chip U10 is connected with one end of the 21 electric capacity C21, and export the 4th constant voltage dc source V4, 4 pin of the 5th stabilized voltage supply chip U10 and the other end common ground of the 21 electric capacity C21.
The present invention is owing to have employed said structure, and compared with prior art, the beneficial effect had is: can detect carbon monoxide, sulfuretted hydrogen, methane and oxygen four kinds of gas concentrations simultaneously, reduce the gas detect cost under coal mine environment; The detection mode of pump suction type, compared with existing natural diffuseness formula, can improve accuracy of detection, is beneficial to and improves the ageing of warning; The information such as voltage in gas concentration, time, machine can be shown in real time, complete function; The concentration determination of gas, the display of various numerical value, on/off and external warning etc., all control by single-chip microcomputer is unified, intelligence degree is high, and energy saving.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention.
Fig. 2 is the electrical schematic diagram of single chip control unit of the present invention.
Fig. 3 is the electrical schematic diagram of Carbon Monoxide Detection circuit of the present invention.
Fig. 4 is the electrical schematic diagram of CH_4 detection circuit of the present invention.
Fig. 5 is the electrical schematic diagram of oxygen detection circuit of the present invention.
Fig. 6 is the electrical schematic diagram of power control circuit of the present invention.
Fig. 7 is the electrical schematic diagram of display control circuit of the present invention.
Fig. 8 is the electrical schematic diagram of asepwirator pump control circuit of the present invention.
Fig. 9 is the electrical schematic diagram of key control circuit of the present invention.
Figure 10 is the electrical schematic diagram of warning circuit of the present invention.
Figure 11 is the electrical schematic diagram of the first power supply stabilization circuit of the present invention.
Figure 12 is the electrical schematic diagram of second source mu balanced circuit of the present invention.
Figure 13 is the electrical schematic diagram of the 3rd power supply stabilization circuit of the present invention.
Figure 14 is the electrical schematic diagram of the 4th power supply stabilization circuit of the present invention.
In figure: 1. single chip control unit; 2. gas detection cell, 21. Carbon Monoxide Detection circuit, 22. sulfurated hydrogen detection circuit, 23. CH_4 detection circuit, 24. oxygen detection circuit; 3. power control circuit, 4. display control circuit, 5. asepwirator pump control circuit, 6. key control circuit, 7. warning circuit; 8. power supply unit, 81. first power supply stabilization circuits, 82. second source mu balanced circuits, 83. the 3rd power supply stabilization circuits, 84. the 4th power supply stabilization circuits.
Embodiment
Technical spirit of the present invention and beneficial effect can be fully understood in order to make the public; applicant will describe in detail the specific embodiment of the present invention below by reference to the accompanying drawings; but applicant is not the restriction to technical scheme to the description of embodiment, any changing in the form rather than substance according to the present invention's design all should be considered as protection scope of the present invention.
Refer to Fig. 1, a kind of pump suction type multi-parameter measuring device, comprise single chip control unit 1, gas detection cell 2, power control circuit 3, display control circuit 4, asepwirator pump control circuit 5, key control circuit 6, warning circuit 7 and power supply unit 8.Described gas detection cell 2 comprises Carbon Monoxide Detection circuit 21, sulfurated hydrogen detection circuit 22, CH_4 detection circuit 23 and oxygen detection circuit 24, and described single chip control unit 1 is connected with Carbon Monoxide Detection circuit 21, sulfurated hydrogen detection circuit 22, CH_4 detection circuit 23, oxygen detection circuit 24, power control circuit 3, display control circuit 4, asepwirator pump control circuit 5, key control circuit 6, warning circuit 7 and power supply unit 8 respectively.Described pump suction type multi-parameter measuring device after powering, is sucked the gases such as carbon monoxide, sulfuretted hydrogen, methane and oxygen in surrounding air, and shows gas concentration in real time in digital form by display control circuit 4 by asepwirator pump.When the concentration of carbon monoxide, sulfuretted hydrogen and methane exceedes the alarm set point of setting or the concentration of oxygen less than or equal to the alarming value arranged, warning circuit 7 sends acoustic alarm signal, transfinites to warn concentration.This analyzer except can except the concentration value of Simultaneously test carbon monoxide, sulfuretted hydrogen, methane and oxygen, to also have in date, time, week and machine the functions such as voltage display.
Refer to Fig. 2, described single chip control unit 1 comprises single-chip microcomputer U1, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4 and crystal oscillator X1, and described single-chip microcomputer U1 adopts PLC16F886.Wherein, the 3rd electric capacity C3, the 4th electric capacity C4 and crystal oscillator X1 form clock control circuit, for single-chip microcomputer U1 provides required clock signal.2 of single-chip microcomputer U1, power control circuit 3 described in 3 pin connect, the oxygen detection circuit 24 described in 4 pin connections of single-chip microcomputer U1, the Carbon Monoxide Detection circuit 21 described in 7 pin connections of single-chip microcomputer U1, 10 of single-chip microcomputer U1, power supply unit 8 described in 16 pin connect, the sulfurated hydrogen detection circuit 22 described in 21 pin connections of single-chip microcomputer U1, the CH_4 detection circuit 23 described in 22 pin connections of single-chip microcomputer U1, 23 of single-chip microcomputer U1, 24, 14, 15, display control circuit 4 described in 18 pin connect, the warning circuit 7 described in 13 pin connections of single-chip microcomputer U1, the asepwirator pump control circuit 5 described in 16 pin connections of single-chip microcomputer U1, the key control circuit 6 described in 25 ~ 28 pin connections of single-chip microcomputer U1.The display of the concentration determination of gas, the analyzing and processing of data, various numerical value, on/off and externally report to the police, all realized by single chip control unit 1, intelligence degree is high.
Refer to Fig. 3, described Carbon Monoxide Detection circuit 21 comprises carbon monoxide probe S1, first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, 5th resistance R5, 6th resistance R6, 7th resistance R7, 8th resistance R8, 9th resistance R9, tenth resistance R10, 11 resistance R11, 12 resistance R12, 5th electric capacity C5, 6th electric capacity C6, 7th electric capacity C7, 8th electric capacity C8, 9th electric capacity C9, first operational amplifier U1A, second operational amplifier U1B and the 3rd operational amplifier U2B, the C0-AF that described carbon monoxide probe S1 adopts Shenzhen to combine to rise Electronics Co., Ltd. to produce, the first described operational amplifier U1A, second operational amplifier U1B and the 3rd operational amplifier U2B adopts LM358.This Carbon Monoxide Detection circuit 21 adopts two-stage signal to amplify, 1,2 pin of carbon monoxide probe S1 meet the first operational amplifier U1A, for providing probe benchmark job of-state voltage, 3 pin of carbon monoxide probe S1 are that sheet writes end, its simulating signal exported exports 7 pin of described single-chip microcomputer U1 to after the second operational amplifier U1B and the 3rd operational amplifier U2B amplifies, for single-chip microcomputer U1 provides the concentration value of carbon monoxide.In the present embodiment, the structure of described sulfurated hydrogen detection circuit 22 is identical with the structure of Carbon Monoxide Detection circuit 21, and the concentration value of sulfuretted hydrogen is output to 21 pin of single-chip microcomputer U1.
Refer to Fig. 4, described CH_4 detection circuit 23 comprises black-and-white component S2, the 13 resistance R13, the 14 resistance R14, the 15 resistance R15, the 16 resistance R16, the 17 resistance R17, the 18 resistance R18, the 19 resistance R19, the tenth electric capacity C10, the 11 electric capacity C11 and four-operational amplifier U3B, the MJC4/2.9J that described black-and-white component S2 adopts China shipbuilding Industry Group Co., Ltd. 718th Institute to produce, four-operational amplifier U3B adopts LM358.Black-and-white component S2 is Coal mine methane detection carrier, for measuring the methane concentration in coal mine operation environment, its simulating signal exported exports 22 pin of described single-chip microcomputer U1 to after four-operational amplifier U3B amplifies, and the second constant voltage dc source V2 provides benchmark job voltage.
Refer to Fig. 5, described oxygen detection circuit 24 comprises oxygen measurement probe S3, the 20 resistance R20, the 21 resistance R21, the 22 resistance R22, the 23 resistance R23, the 12 electric capacity C12 and the 5th operational amplifier U4A, the 02-A2 that described oxygen measurement probe S3 adopts Shenzhen to combine to rise Electronics Co., Ltd. to produce, the 5th described operational amplifier U4A adopts LM358.Oxygen measurement probe S3 outputting analog signal, after the 5th operational amplifier U4A amplifies, export 4 pin of described single-chip microcomputer U1 to, provide oxygen density value, the 3rd constant voltage dc source V3 provides benchmark job voltage.
Refer to Fig. 6, described power control circuit 3 comprises charging connector J1, diode D1, the 24 resistance R24, the 25 resistance R25, the 26 resistance R26, the 27 resistance R27 and battery E, and described battery E is the potassium manganate battery of the YT183650 type that Weifang, Shandong Chen Hui Li TEC Battery GmbH produces.Charging inlet J1 is voltage input end, one end of charging connector J1 is connected with one end of the positive pole of diode D1 and the 24 resistance R24, the other end and one end of the 25 resistance R25 of 24 resistance R24 are connected 2 pin of described single-chip microcomputer U1 jointly, 2 pin of single-chip microcomputer U1 are charging detection lug mouth, for detecting the charging and discharging state of battery E; One end and one end of the 27 resistance R27 of 26 resistance R26 are connected 3 pin of single-chip microcomputer U1 jointly, and 3 pin of single-chip microcomputer U1 are voltage detecting sheet mouth, for detecting the voltage of battery E, controlled time under-voltage by single-chip microcomputer U1, analyzer is shut down.The negative pole of diode D1 is connected with the other end of the 26 resistance R26 and the positive pole of battery E, exports the first direct supply VDD, for each circuit in analyzer provides necessary working power.
Refer to Fig. 7, described display control circuit 4 comprises LCD display U5, the first triode Q1 and the 28 resistance R28, the AOXPOO63A-00 that described LCD display U5 adopts Shanghai Ao Xian Electronic Science and Technology Co., Ltd. to produce.15 pin of the single-chip microcomputer U1 described in the connection of one end of the 28 resistance R28,15 pin of single-chip microcomputer U1 are backlight control interface, control the backlight illumination of LCD display U5.The other end of the 28 resistance R28 connects the base stage of the first triode Q1, and the collector of the first triode Q1 connects the K end of LCD display U5.The VLCD end of LCD display U5 connects 18 pin of single-chip microcomputer U1, carries out voltage output; The DATA end of LCD display U5 connects 14 pin of single-chip microcomputer U1, is data port; LCD display U5 /WR holds 23 pin connecting single-chip microcomputer U1, is write end; LCD display U5 /CS holds 24 pin connecting single-chip microcomputer U1, is sheet choosing end.This display control circuit 4 is except can showing gas concentration value, date, time, week, also has low-voltage Presentation Function, can show cell voltage, to guarantee to charge in time before dead battery capability, avoid occurring to detect gas concentration in time because of dead battery capability, thus the situation causing accident to occur.
Refer to Fig. 8, described asepwirator pump control circuit 5 comprises bidirectional triode thyristor ZD, switch contacts J2, asepwirator pump joint J3, the first stabilized voltage supply chip U6, the second triode Q2, the 29 resistance R29, the 30 resistance R30, the 13 electric capacity C13 and micro air pump M, the first described stabilized voltage supply chip U6 adopts TPS79330, micro air pump M to adopt the GMPA-1 of Beijing gold longevity micro air pump development and production center production.Described switch contacts J2 is external to be opened, stop button, and 2 pin of switch contacts J2 connect the control pole of bidirectional triode thyristor ZD, for controlling the duty of micro air pump M.16 pin of the single-chip microcomputer U1 described in emitter connection of the second triode Q2,16 pin of single-chip microcomputer U1 are enable control end, and when it exports high level, the second triode Q2 conducting, micro air pump M starts working.First stabilized voltage supply chip U6, the 30 resistance R30 and the 13 electric capacity C13 form power supply stabilization circuit, provide standard output voltage.Adopt micro air pump M, absorb in airtight air chamber by detected gas by air pump, compared with natural diffuseness formula gas determinator, accuracy of detection is more accurate.
Refer to Fig. 9, described key control circuit 6 comprises the first button K1, the second button K2, the 3rd button K3 and the 4th button K4.26 pin of the single-chip microcomputer U1 described in the connection of one end of the first described button K1, one end of second button K2 connects 27 pin of single-chip microcomputer U1, one end of 3rd button K3 connects 25 pin of single-chip microcomputer U1, one end of 4th button K4 connects 28 pin of single-chip microcomputer U1, wherein, first button K1 is self-inspection key, and the second button K2 is for detecting key, and the 3rd button K3 is on & off switch, the 4th button K4 is school zero key.
Refer to Figure 10, described warning circuit 7 comprises the 31 resistance R31, the 3rd triode Q3 and hummer B, and 13 pin of the single-chip microcomputer U1 described in the connection of one end of the 31 described resistance R31, the 3rd triode Q3 forms power amplification unit.When the concentration of carbon monoxide, sulfuretted hydrogen and methane exceedes the alarm set point of setting or the concentration of oxygen less than or equal to the alarming value arranged, described single-chip microcomputer U1 controls warning circuit 7 and sends acoustic alarm signal, transfinites to warn concentration.
Refer to Figure 11 ~ Figure 14, described power supply unit 8 comprises the first power supply stabilization circuit 81, second source mu balanced circuit 82, the 3rd power supply stabilization circuit 83 and the 4th power supply stabilization circuit 84.The first described power supply stabilization circuit 81 comprises the second stabilized voltage supply chip U7, the 14 electric capacity C14 and the 15 electric capacity C15, and the second stabilized voltage supply chip U7 adopts TPS79330.First direct supply VDD changes and exports the first constant voltage dc source V1 by the first power supply stabilization circuit 81.Described second source mu balanced circuit 82 comprises the 3rd stabilized voltage supply chip U8, the 16 electric capacity C16 and the 17 electric capacity C17, and the 3rd stabilized voltage supply chip U8 adopts TPS79328.First direct supply VDD changes and exports the second constant voltage dc source V2 by second source mu balanced circuit 82.16 pin of the single-chip microcomputer U1 described in 3 pin connections of the 3rd stabilized voltage supply chip U8.For protection black-and-white component S2, when analyzer detects that in surrounding air, methane concentration is more than or equal to alarming value point, analyzer cuts off the power supply of black-and-white component S2 and reports to the police.After detecting after analyzer start that not mounting black-and-white component S2 or black-and-white component S2 lost efficacy, analyzer cuts out the power supply of black-and-white component S2, to reduce the power consumption of analyzer.The 3rd described power supply stabilization circuit 83 comprises the 4th stabilized voltage supply chip U9, the 18 electric capacity C18 and the 19 electric capacity C19, and the 4th stabilized voltage supply chip U9 adopts 10 pin of the single-chip microcomputer U1 described in 3 pin connections of TPS79328, the 4th stabilized voltage supply chip U9.In the standby state, single-chip microcomputer U1 controls the 3rd stabilized voltage supply chip U8 and the 4th stabilized voltage supply chip U9 no power, makes analyzer enter battery saving mode.First direct supply VDD changes and exports the 3rd constant voltage dc source V3 by the 3rd power supply stabilization circuit 83.The 4th described power supply stabilization circuit 84 comprises the 5th stabilized voltage supply chip U10, the 20 electric capacity C20 and the 21 electric capacity C21, and the 5th stabilized voltage supply chip U10 adopts MAX829.3rd constant voltage dc source V3 changes and exports the 4th constant voltage dc source V3 by the 4th power supply stabilization circuit 84.Power supply unit 8 is the standard output power supply of analyzer each several part circuit with stable, to guarantee the work of each several part circuit stability, extends the serviceable life of each several part circuit.
The present invention is mainly used in underground coal mine CH_4 detection person, fireboss, class monitor and group leader, team leader, engineering technical personnel, lower ore deposit cadre, the person of blowing out carry with, carry out methane, oxygen, carbon monoxide, the detection of concentration of hydrogen sulfide and warning, accuracy of detection be high, energy saving and complete function.
Claims (10)
1. a pump suction type multi-parameter measuring device, comprise single chip control unit (1), gas detection cell (2), power control circuit (3), display control circuit (4), asepwirator pump control circuit (5), key control circuit (6), warning circuit (7) and power supply unit (8), it is characterized in that: described gas detection cell (2) comprises Carbon Monoxide Detection circuit (21), sulfurated hydrogen detection circuit (22), CH_4 detection circuit (23) and oxygen detection circuit (24), described single chip control unit (1) respectively with Carbon Monoxide Detection circuit (21), sulfurated hydrogen detection circuit (22), CH_4 detection circuit (23), oxygen detection circuit (24), power control circuit (3), display control circuit (4), asepwirator pump control circuit (5), key control circuit (6), warning circuit (7) and power supply unit (8) connect.
2. a kind of pump suction type multi-parameter measuring device according to claim 1, it is characterized in that described single chip control unit (1) comprises single-chip microcomputer U1, first electric capacity C1, second electric capacity C2, 3rd electric capacity C3, 4th electric capacity C4 and crystal oscillator X1, described single-chip microcomputer U1 adopts PLC16F886, one end of first electric capacity C1, one end of second electric capacity C2 and 20 pin of single-chip microcomputer U1 connect the first constant voltage dc source V1 jointly, one end of 3rd electric capacity C3 is connected 11 pin of single-chip microcomputer U1 jointly with one end of crystal oscillator X1, one end of 4th electric capacity C4 is connected 12 pin of single-chip microcomputer U1 jointly with the other end of crystal oscillator X1, 2 of single-chip microcomputer U1, power control circuit (3) described in 3 pin connect, the oxygen detection circuit (24) described in 4 pin connections of single-chip microcomputer U1, 5 pin of single-chip microcomputer U1 connect the 3rd constant voltage dc source V3, the Carbon Monoxide Detection circuit (21) described in 7 pin connections of single-chip microcomputer U1, 10 of single-chip microcomputer U1, power supply unit (8) described in 16 pin connect, the sulfurated hydrogen detection circuit (22) described in 21 pin connections of single-chip microcomputer U1, the CH_4 detection circuit (23) described in 22 pin connections of single-chip microcomputer U1, 23 of single-chip microcomputer U1, 24, 14, 15, display control circuit (4) described in 18 pin connect, the warning circuit (7) described in 13 pin connections of single-chip microcomputer U1, the asepwirator pump control circuit (5) described in 16 pin connections of single-chip microcomputer U1, the key control circuit (6) described in 25 ~ 28 pin connections of single-chip microcomputer U1, the other end of the first electric capacity C1, the other end of the second electric capacity C2, the other end of the 3rd electric capacity C3, the other end of the 4th electric capacity C4 and 8 of single-chip microcomputer U1, 19 pin common grounds.
3. a kind of pump suction type multi-parameter measuring device according to claim 2, is characterized in that described Carbon Monoxide Detection circuit (21) comprises carbon monoxide probe S1, first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, 5th resistance R5, 6th resistance R6, 7th resistance R7, 8th resistance R8, 9th resistance R9, tenth resistance R10, 11 resistance R11, 12 resistance R12, 5th electric capacity C5, 6th electric capacity C6, 7th electric capacity C7, 8th electric capacity C8, 9th electric capacity C9, first operational amplifier U1A, second operational amplifier U1B and the 3rd operational amplifier U2B, described carbon monoxide probe S1 adopts C0-AF, the first described operational amplifier U1A, second operational amplifier U1B and the 3rd operational amplifier U2B adopts LM358, carbon monoxide probe 1 pin of S1 is connected with 1 pin of one end of the 5th electric capacity C5 and the first operational amplifier U1A, the other end of the 5th electric capacity C5 is connected with one end of one end of the first resistance R1 and the second resistance R2, the other end of the first resistance R1 connects 2 pin of carbon monoxide probe S1, 3 pin of carbon monoxide probe S1 connect one end of the 5th resistance R5, the other end of the 5th resistance R5 and one end of the 4th resistance R4, one end of 6th electric capacity C6 and 6 pin of the second operational amplifier U1B connect, the other end of the 4th resistance R4 and the other end of the 6th electric capacity C6, 7 pin of the second operational amplifier U1B and one end of the 7th resistance R7 connect, 5 pin of the second operational amplifier U1B connect one end of the 6th resistance R6, the other end of the 7th resistance R7 is connected with 5 pin of one end of the 8th resistance R8 and the 3rd operational amplifier U2B, 6 pin of the 3rd operational amplifier U2B and one end of the 9th resistance R9, one end of tenth resistance R10 and one end of the 9th electric capacity C9 connect, the other end of the tenth resistance R10 and the other end of the 9th electric capacity C9, 7 pin of the 3rd operational amplifier U2B and one end of the 11 resistance R11 connect, the other end and one end of the 12 resistance R12 of 11 resistance R11 are connected 7 pin of described single-chip microcomputer U1 jointly, the other end of the second resistance R2 connects 2 pin of the first operational amplifier U1A, 3 pin of the first operational amplifier U1A connect one end of the 3rd resistance R3,8 pin of the first operational amplifier U1A, one end of 7th electric capacity C7, one end of 8th electric capacity C8 and the other end of the 12 resistance R12 connect the 3rd constant voltage dc source V3 jointly, and 4 pin of the first operational amplifier U1A connect the 4th constant voltage dc source V4, the other end of the 3rd resistance R3, the other end of the 7th electric capacity C7, the other end of the 8th electric capacity C8, the other end of the 6th resistance R6, the other end of the 8th resistance R8 and the other end common ground of the 9th resistance R9.
4. a kind of pump suction type multi-parameter measuring device according to claim 2, it is characterized in that described CH_4 detection circuit (23) comprises black-and-white component S2, 13 resistance R13, 14 resistance R14, 15 resistance R15, 16 resistance R16, 17 resistance R17, 18 resistance R18, 19 resistance R19, tenth electric capacity C10, 11 electric capacity C11 and four-operational amplifier U3B, described black-and-white component S2 adopts MJC4/2.9J, four-operational amplifier U3B adopts LM358, 2 pin of black-and-white component S2 connect one end of the 16 resistance R16, the other end of the 16 resistance R16 and one end of the tenth electric capacity C10, one end of 17 resistance R17 and 5 pin of four-operational amplifier U3B connect, 6 pin of four-operational amplifier U3B and one end of the 15 resistance R15, one end of 11 electric capacity C11 and one end of the 18 resistance R18 connect, the other end of the 15 resistance R15 is connected with one end of the 13 resistance R13 and one end of the 14 resistance R14, the other end of the 11 electric capacity C11 and the other end of the 18 resistance R18, 7 pin of four-operational amplifier U3B and one end of the 19 resistance R19 connect, 22 pin of the single-chip microcomputer U1 described in other end connection of the 19 resistance R19, 1 pin of black-and-white component S2 is connected the second constant voltage dc source V2 jointly with one end of the 13 resistance R13, 3 pin of black-and-white component S2, the other end of the 14 resistance R14, the other end of the tenth electric capacity C10 and the other end common ground of the 17 resistance R17.
5. a kind of pump suction type multi-parameter measuring device according to claim 2, it is characterized in that described oxygen detection circuit (24) comprises oxygen measurement probe S3, 20 resistance R20, 21 resistance R21, 22 resistance R22, 23 resistance R23, 12 electric capacity C12 and the 5th operational amplifier U4A, described oxygen measurement probe S3 adopts 02-A2, the 5th described operational amplifier U4A adopts LM358, one end of oxygen measurement probe S3 connects one end of the 20 resistance R20, the other end of the 20 resistance R20 and one end of the 12 electric capacity C12, one end of 22 resistance R22 and 2 pin of the 5th operational amplifier U4A connect, the other end of the 12 electric capacity C12 and the other end of the 22 resistance R22, 1 pin of the 5th operational amplifier U4A and one end of the 23 resistance R23 connect, 4 pin of the single-chip microcomputer U1 described in other end connection of the 23 resistance R23, 3 pin of the 5th operational amplifier U4A connect one end of the 21 resistance R21, 4 pin of the 5th operational amplifier U4A connect the 3rd constant voltage dc source V3, the other end of oxygen measurement probe S3, the other end of the 21 resistance R21 and the 8 pin common grounds of the 5th operational amplifier U4A.
6. a kind of pump suction type multi-parameter measuring device according to claim 2, it is characterized in that described power control circuit (3) comprises charging connector J1, diode D1, 24 resistance R24, 25 resistance R25, 26 resistance R26, 27 resistance R27 and battery E, described battery E is the potassium manganate battery of YT183650 type, one end of charging connector J1 is connected with one end of the positive pole of diode D1 and the 24 resistance R24, the other end and one end of the 25 resistance R25 of 24 resistance R24 are connected 2 pin of described single-chip microcomputer U1 jointly, one end and one end of the 27 resistance R27 of 26 resistance R26 are connected 3 pin of single-chip microcomputer U1 jointly, the negative pole of diode D1 is connected with the other end of the 26 resistance R26 and the positive pole of battery E, and export the first direct supply VDD, the other end of charging connector J1, the other end of the 25 resistance R25, the other end of the 27 resistance R27 and the negative pole common ground of battery E.
7. a kind of pump suction type multi-parameter measuring device according to claim 2, it is characterized in that described display control circuit (4) comprises LCD display U5, first triode Q1 and the 28 resistance R28, described LCD display U5 adopts AOXPOO63A-00, 15 pin of the single-chip microcomputer U1 described in the connection of one end of the 28 resistance R28, the other end of the 28 resistance R28 connects the base stage of the first triode Q1, the collector of the first triode Q1 connects the K end of LCD display U5, the VLCD end of LCD display U5 connects 18 pin of single-chip microcomputer U1, the DATA end of LCD display U5 connects 14 pin of single-chip microcomputer U1, LCD display U5 /WR end connects 23 pin of single-chip microcomputer U1, LCD display U5 /CS end connects 24 pin of single-chip microcomputer U1, the A of LCD display U5 holds connection first constant voltage dc source V1, the VSS end of LCD display U5 and the emitter common ground of the first triode Q1.
8. a kind of pump suction type multi-parameter measuring device according to claim 2, it is characterized in that described asepwirator pump control circuit (5) comprises bidirectional triode thyristor ZD, switch contacts J2, asepwirator pump joint J3, first stabilized voltage supply chip U6, second triode Q2, 29 resistance R29, 30 resistance R30, 13 electric capacity C13 and micro air pump M, the first described stabilized voltage supply chip U6 adopts TPS79330, micro air pump M adopts GMPA-1, described switch contacts J2 is external to be opened, stop button, 2 pin of switch contacts J2 connect the control pole of bidirectional triode thyristor ZD, the first anode of bidirectional triode thyristor ZD is connected with one end of 3 pin of switch contacts J2 and the 29 resistance R29, the other end of the 29 resistance R29 connects the base stage of the second triode Q2, 16 pin of the single-chip microcomputer U1 described in emitter connection of the second triode Q2, the collector of the second triode Q2 is connected with 3 pin of one end of the 30 resistance R30 and the first stabilized voltage supply chip U6, 5 pin of the first stabilized voltage supply chip U6 are connected with one end of the 13 electric capacity C13 and 1 pin of asepwirator pump joint J3, 1 of asepwirator pump joint J3, 2 pin are connected with the two ends of micro air pump M respectively, 1 pin of the first stabilized voltage supply chip U6 meets the second direct supply VCC, 1 pin of switch contacts J2, the second anode of bidirectional triode thyristor ZD, the other end of the 30 resistance R30, the other end of the 13 electric capacity C13, 2 pin of the first stabilized voltage supply chip U6 and the 2 pin common grounds of asepwirator pump joint J3.
9. a kind of pump suction type multi-parameter measuring device according to claim 2, it is characterized in that described key control circuit (6) comprises the first button K1, second button K2, 3rd button K3 and the 4th button K4, 26 pin of the single-chip microcomputer U1 described in the connection of one end of the first described button K1, one end of second button K2 connects 27 pin of single-chip microcomputer U1, one end of 3rd button K3 connects 25 pin of single-chip microcomputer U1, one end of 4th button K4 connects 28 pin of single-chip microcomputer U1, the other end of the first button K1, the other end of the second button K2, the other end of the 3rd button K3 and the other end common ground of the 4th button K4, described warning circuit (7) comprises the 31 resistance R31, the 3rd triode Q3 and hummer B, 13 pin of the single-chip microcomputer U1 described in the connection of one end of the 31 described resistance R31, the other end of the 31 resistance R31 connects the base stage of the 3rd triode Q3, the collector of the 3rd triode Q3 connects one end of hummer B, the other end of hummer B connects the first direct supply VDD, the grounded emitter of the 3rd triode Q3.
10. a kind of pump suction type multi-parameter measuring device according to claim 2, it is characterized in that described power supply unit (8) comprises the first power supply stabilization circuit (81), second source mu balanced circuit (82), 3rd power supply stabilization circuit (83) and the 4th power supply stabilization circuit (84), described the first power supply stabilization circuit (81) comprises the second stabilized voltage supply chip U7, 14 electric capacity C14 and the 15 electric capacity C15, second stabilized voltage supply chip U7 adopts TPS79330, 1 of second stabilized voltage supply chip U7, one end of 3 pin and the 14 electric capacity C14 connects the first direct supply VDD jointly, 5 pin of the second stabilized voltage supply chip U7 are connected with one end of the 15 electric capacity C15, and export the first constant voltage dc source V1, the other end of the 14 electric capacity C14, the other end of the 15 electric capacity C15 and the 2 pin common grounds of the second stabilized voltage supply chip U7, described second source mu balanced circuit (82) comprises the 3rd stabilized voltage supply chip U8, 16 electric capacity C16 and the 17 electric capacity C17, 3rd stabilized voltage supply chip U8 adopts TPS79328, 1 pin of the 3rd stabilized voltage supply chip U8 is connected the first direct supply VDD jointly with one end of the 16 electric capacity C16, 5 pin of the 3rd stabilized voltage supply chip U8 are connected with one end of the 17 electric capacity C17, and export the second constant voltage dc source V2, 16 pin of the single-chip microcomputer U1 described in 3 pin connections of the 3rd stabilized voltage supply chip U8, the other end of the 16 electric capacity C16, the other end of the 17 electric capacity C17 and the 2 pin common grounds of the 3rd stabilized voltage supply chip U8, the 3rd described power supply stabilization circuit (83) comprises the 4th stabilized voltage supply chip U9, 18 electric capacity C18 and the 19 electric capacity C19, 4th stabilized voltage supply chip U9 adopts TPS79328, 1 pin of the 4th stabilized voltage supply chip U9 is connected the first direct supply VDD jointly with one end of the 18 electric capacity C18, 5 pin of the 4th stabilized voltage supply chip U9 are connected with one end of the 19 electric capacity C19, and export the 3rd constant voltage dc source V3, 10 pin of the single-chip microcomputer U1 described in 3 pin connections of the 4th stabilized voltage supply chip U9, the other end of the 18 electric capacity C18, the other end of the 19 electric capacity C19 and the 2 pin common grounds of the 4th stabilized voltage supply chip U9, the 4th described power supply stabilization circuit (84) comprises the 5th stabilized voltage supply chip U10, 20 electric capacity C20 and the 21 electric capacity C21, 5th stabilized voltage supply chip U10 adopts MAX829, 2 pin of the 5th stabilized voltage supply chip U10 connect the 3rd constant voltage dc source V3, 5 pin of the 5th stabilized voltage supply chip U10 connect one end of the 20 electric capacity C20, the other end of the 20 electric capacity C20 connects 3 pin of the 5th stabilized voltage supply chip U10, 1 pin of the 5th stabilized voltage supply chip U10 is connected with one end of the 21 electric capacity C21, and export the 4th constant voltage dc source V4, 4 pin of the 5th stabilized voltage supply chip U10 and the other end common ground of the 21 electric capacity C21.
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| CN201510650470.7A CN105203714A (en) | 2015-10-09 | 2015-10-09 | Pumping type multi-parameter determining device |
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| CN201510650470.7A CN105203714A (en) | 2015-10-09 | 2015-10-09 | Pumping type multi-parameter determining device |
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| CN105203714A true CN105203714A (en) | 2015-12-30 |
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| CN201510650470.7A Pending CN105203714A (en) | 2015-10-09 | 2015-10-09 | Pumping type multi-parameter determining device |
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