CN111431162A - Power supply circuit system for reducing power consumption of coal mine laser methane sensor - Google Patents
Power supply circuit system for reducing power consumption of coal mine laser methane sensor Download PDFInfo
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- CN111431162A CN111431162A CN202010201632.XA CN202010201632A CN111431162A CN 111431162 A CN111431162 A CN 111431162A CN 202010201632 A CN202010201632 A CN 202010201632A CN 111431162 A CN111431162 A CN 111431162A
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- power supply
- diode
- power consumption
- laser methane
- sensor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention relates to a power supply circuit system for reducing power consumption of a coal mine laser methane sensor, and belongs to the field of sensor power supply. The system comprises a current-limiting protection circuit, a high-frequency interference prevention circuit, a cache input circuit and a switching power supply which are connected in sequence; the current-limiting protection circuit prevents the whole monitoring system from being in fault when the fault occurs under the condition of loading the sensor mainboard and the overlarge current is generated; the high-frequency interference preventing circuit prevents high-frequency interference which is unintentionally generated in air and in the circuit; the cache input circuit solves the problems that the power consumption of the whole sensor is overlarge due to instantaneous large current generated when a laser methane sensor probe is started, the laser methane sensor cannot normally work when being far away from a power supply, the load sensor capacity of the whole monitoring system is reduced and the like, namely the power consumption of the laser methane sensor is reduced; the switching power supply is used for realizing efficient voltage conversion and outputting stable direct current. The invention reduces the problem of instantaneous large power consumption of the sensor by the buffer input circuit.
Description
Technical Field
The invention belongs to the field of sensor power supply, and relates to a power supply circuit system for reducing power consumption of a coal mine laser methane sensor.
Background
The power supply in the coal mine is centralized intrinsic safety power supply, and the power supply of the detection system components of the coal mine generally needs to pass through a long-distance cable, so the lower the power consumption of the sensor, the better the power consumption. The existing laser methane sensor probe is limited by the fact that a large current needs to be supplied to a laser generator and a temperature control circuit at the moment of starting, and then the sensor can work normally. Therefore, the research on the power supply of the probe has very important significance for reducing the power consumption of the sensor.
The existing method for reducing the power consumption of the laser methane sensor in the coal mine mainly comprises the following steps: the power consumption of the mine laser methane sensor probe is reduced, the power consumption of the probe is reduced from the beginning of the sensor probe, and the phenomenon that the instantaneous power consumption of the probe is overlarge is avoided; reduce sensor mainboard consumption. Low power consumption components are selected to reduce overall power consumption. However, the voltage output by the existing circuit for reducing the excessive instantaneous power consumption of the probe is not stable enough. Therefore, there is a need for a circuit that is versatile for all sensor probes for providing a stable voltage to a load cell.
Disclosure of Invention
In view of this, the present invention provides a power supply circuit system for reducing power consumption of a laser methane sensor in a coal mine, which can effectively improve the capability of loading the sensor in the system. When the laser methane sensor is supplied with insufficient power continuously or instantaneously, the circuit system can improve the overall stability of the laser methane sensor.
In order to achieve the purpose, the invention provides the following technical scheme:
a power supply circuit system for reducing power consumption of a coal mine laser methane sensor comprises a current-limiting protection circuit, a high-frequency interference prevention circuit, a cache input circuit and a switching power supply which are sequentially connected;
the current-limiting protection circuit is used for preventing the whole monitoring system from generating faults when the faults occur under the condition of loading a sensor mainboard and overlarge current is generated;
the high-frequency interference preventing circuit is used for preventing high-frequency interference which is unintentionally generated in air and in the circuit;
the cache input circuit is used for solving the problems that the power consumption of the whole sensor is overlarge due to instantaneous large current generated when the laser methane sensor probe is started, the laser methane sensor cannot normally work when being far away from a power supply, and the load sensor capability of the whole monitoring system is reduced, namely the power consumption of the laser methane sensor is reduced;
the switching power supply is used for realizing efficient voltage conversion and outputting stable direct current.
Furthermore, the current-limiting protection circuit consists of a capacitor C5, a resistor R1, resistors R3-R5, diodes D2-D3, a diode D6, a diode D7, a triode Q8 and a MOS transistor M1;
the source electrode of the MOS tube is connected with one ends of resistors R1 and R4-R5, the base electrode of the triode Q8 and the negative electrode of the diode D6; the grid of the MOS tube is connected with the other end of the resistor R1, the anode of the diode D6, the collector of the triode Q8 and one end of the resistor R3; the drain electrode of the MOS tube is sequentially connected with diodes D2-D3 in a forward direction; the other end of the resistor R3 is grounded; an emitter of the triode Q8 is connected with the other ends of the resistors R4-R5, one end of the capacitor C5, the anode of the diode D7 and a power interface; the other end of the capacitor C5 is grounded with the cathode of the diode D7.
Furthermore, the resistor R1 is a thermistor, the diodes D2 to D3 are schottky diodes, the diode D6 is a zener diode, and the diode D7 is a TVS diode.
Furthermore, the high-frequency interference prevention circuit is composed of an inductor L1 and diodes D4-D5, wherein one end of the inductor is connected with the negative electrode of the diode D3 and the negative electrodes of the diodes D4-D5, and the other end of the inductor is connected with the positive electrodes of the diodes D4-D5.
Furthermore, the diodes D4-D5 are high-speed switching diodes.
Further, the buffer input circuit is composed of a resistor R2, a diode D1 and large capacitors E1-E2; the large capacitors E1-E2 are connected in parallel, the anodes of the large capacitors are connected with one end of the resistor R2 and the anode of the diode D1, and the cathodes of the large capacitors are grounded; the other end of the resistor R2 is connected to the cathode of the diode D1 and the anodes of the diodes D4 to D5.
Further, the switch power supply consists of capacitors C1-C4 and a chip U1, wherein the capacitors C1-C2 are connected in parallel, one end of the capacitor C1-C2 is connected with an inlet of the chip U1 and the negative electrode of a diode D1, and the other end of the capacitor C1-C2 is grounded; capacitors C3-C4 are connected in parallel, one end of each capacitor is connected with the outlet of the chip U1, and the other end of each capacitor is grounded; the outlet of chip U1 is connected to a load.
The invention has the beneficial effects that: according to the invention, a buffer input circuit is formed by large capacitors E1 and E2 and diodes D1 and R2, so that the problem of instantaneous large power consumption of the sensor is solved, and stable current is efficiently output.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a diagram of a power supply scheme for reducing power consumption of a laser methane sensor in a coal mine;
fig. 2 is a circuit diagram of a low power supply.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Referring to fig. 1 to 2, a power supply circuit system for reducing power consumption of a laser methane sensor in a coal mine includes a current-limiting protection circuit, a high-frequency interference prevention circuit, a cache input circuit, and a switching power supply, which are connected in sequence. The current limiting protection circuit is used for preventing the whole monitoring system from being in fault when the load sensor mainboard is in fault and generates overlarge current. The high-frequency interference preventing circuit is used for preventing interference such as high frequency which is unintentionally generated in air and in a circuit. The cache input circuit is used for solving the problems that the power consumption of the whole sensor is overlarge due to instantaneous large current when the laser methane sensor probe is started, the laser methane sensor cannot normally work when being far away from a power supply, the capacity of a load sensor of the whole monitoring system is reduced, and the like, namely the power consumption of the laser methane sensor is reduced. The switching power supply is used for realizing efficient voltage conversion and outputting stable direct current.
As shown in fig. 2, the current-limiting protection circuit is composed of a capacitor C5, a resistor R1, resistors R3 to R5, diodes D2 to D3, a diode D6, a diode D7, a triode Q8, and a MOS transistor M1. The source electrode of the MOS tube is connected with one end of a resistor R1, one end of a resistor R4-R5, the base electrode of the triode Q8 and the negative electrode of the diode D6; the grid of the MOS tube is connected with the other end of the resistor R1, the anode of the diode D6, the collector of the triode Q8 and one end of the resistor R3; the drain electrode of the MOS tube is sequentially connected with diodes D2-D3 in a forward direction; the other end of the resistor R3 is grounded; an emitter of the triode Q8 is connected with the other ends of the resistors R4-R5, one end of the capacitor C5, the anode of the diode D7 and the power interface; the other end of the capacitor C5 is grounded with the cathode of the diode D7. The resistor R1 is a thermistor, the diodes D2-D3 are Schottky diodes, the diode D6 is a voltage stabilizing diode, and the diode D7 is a TVS diode.
The high-frequency interference prevention circuit comprises an inductor L1 and diodes D4-D5, wherein one end of the inductor is connected with the cathode of the diode D3 and the cathodes of the diodes D4-D5, and the other end of the inductor is connected with the anodes of the diodes D4-D5, and the diodes D4-D5 are high-speed switching diodes.
The cache input circuit consists of a resistor R2, a diode D1 and large capacitors E1-E2; the large capacitors E1-E2 are connected in parallel, the anodes of the large capacitors are connected with one end of the resistor R2 and the anode of the diode D1, and the cathodes of the large capacitors are grounded; the other end of the resistor R2 is connected to the cathode of the diode D1 and the anodes of the diodes D4 to D5.
The switch power supply comprises capacitors C1-C4 and a chip U1, wherein the capacitors C1-C2 are connected in parallel, one end of each capacitor is connected with an inlet of a chip U1 and a negative electrode of a diode D1, the other end of each capacitor is grounded, the capacitors C3-C4 are connected in parallel, one end of each capacitor is connected with an outlet of the chip U1, the other end of each capacitor is grounded, and an outlet of the chip U1 is connected with a load.
After the laser methane sensor is powered on, external power supply enters a low-power supply module as shown in fig. 1, enters a cache input circuit through a current-limiting protection circuit and a high-frequency prevention circuit, and is converted into stable direct-current voltage for the whole laser methane sensor through a switching power supply. When the probe of the laser methane sensor is started, an instantaneous large current is needed to start the sensor probe, and under the action of a fast charging and slow discharging circuit consisting of large capacitors E1 and E2, a diode D1 and a resistor R2 in the figure 2, the instantaneous large current can be smoothed, so that the current magnitude of the required moment is indirectly reduced.
Therefore, the instantaneous large current of the laser methane sensor can be reduced to an acceptable range through the circuit, and the low power consumption of the whole sensor is further realized, so that the load capacity of a product in remote power supply is improved.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (7)
1. A power supply circuit system for reducing power consumption of a coal mine laser methane sensor is characterized by comprising a current-limiting protection circuit, a high-frequency interference prevention circuit, a cache input circuit and a switching power supply which are sequentially connected;
the current-limiting protection circuit is used for preventing the whole monitoring system from generating faults when the faults occur under the condition of loading a sensor mainboard and overlarge current is generated;
the high-frequency interference preventing circuit is used for preventing high-frequency interference which is unintentionally generated in air and in the circuit;
the cache input circuit is used for solving the problems that the power consumption of the whole sensor is overlarge due to instantaneous large current generated when the laser methane sensor probe is started, the laser methane sensor cannot normally work when being far away from a power supply, and the load sensor capability of the whole monitoring system is reduced, namely the power consumption of the laser methane sensor is reduced;
the switching power supply is used for realizing efficient voltage conversion and outputting stable direct current.
2. The power supply circuit system for reducing the power consumption of the coal mine laser methane sensor according to claim 1, wherein the current-limiting protection circuit is composed of a capacitor C5, a resistor R1, resistors R3-R5, diodes D2-D3, a diode D6, a diode D7, a triode Q8 and a MOS transistor M1;
the source electrode of the MOS tube is connected with one ends of resistors R1 and R4-R5, the base electrode of the triode Q8 and the negative electrode of the diode D6; the grid of the MOS tube is connected with the other end of the resistor R1, the anode of the diode D6, the collector of the triode Q8 and one end of the resistor R3; the drain electrode of the MOS tube is sequentially connected with diodes D2-D3 in a forward direction; the other end of the resistor R3 is grounded; an emitter of the triode Q8 is connected with the other ends of the resistors R4-R5, one end of the capacitor C5, the anode of the diode D7 and a power interface; the other end of the capacitor C5 is grounded with the cathode of the diode D7.
3. The power supply circuit system for reducing power consumption of the coal mine laser methane sensor as claimed in claim 2, wherein the resistor R1 is a thermistor, the diodes D2-D3 are Schottky diodes, the diode D6 is a voltage stabilizing diode, and the diode D7 is a TVS diode.
4. The power supply circuit system for reducing the power consumption of the coal mine laser methane sensor according to claim 2, wherein the high-frequency interference prevention circuit is composed of an inductor L1 and diodes D4-D5, one end of the inductor is connected with the cathode of the diode D3 and the cathodes of the diodes D4-D5, and the other end of the inductor is connected with the anodes of the diodes D4-D5.
5. The power supply circuit system for reducing power consumption of the coal mine laser methane sensor according to claim 3, wherein the diodes D4-D5 are high-speed switching diodes.
6. The power supply circuit system for reducing the power consumption of the coal mine laser methane sensor according to claim 4, wherein the buffer input circuit is composed of a resistor R2, a diode D1 and large capacitors E1-E2; the large capacitors E1-E2 are connected in parallel, the anodes of the large capacitors are connected with one end of the resistor R2 and the anode of the diode D1, and the cathodes of the large capacitors are grounded; the other end of the resistor R2 is connected to the cathode of the diode D1 and the anodes of the diodes D4 to D5.
7. The power supply circuit system for reducing the power consumption of the coal mine laser methane sensor according to claim 6, wherein the switch power supply is composed of capacitors C1-C4 and a chip U1, wherein the capacitors C1-C2 are connected in parallel, one end of the capacitor C1-C2 is connected with an inlet of the chip U1 and a negative electrode of a diode D1, and the other end of the capacitor C1-C2 is grounded; capacitors C3-C4 are connected in parallel, one end of each capacitor is connected with the outlet of the chip U1, and the other end of each capacitor is grounded; the outlet of chip U1 is connected to a load.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010201632.XA CN111431162B (en) | 2020-03-20 | 2020-03-20 | Power supply circuit system for reducing power consumption of coal mine laser methane sensor |
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| CN202010201632.XA CN111431162B (en) | 2020-03-20 | 2020-03-20 | Power supply circuit system for reducing power consumption of coal mine laser methane sensor |
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| CN111431162A true CN111431162A (en) | 2020-07-17 |
| CN111431162B CN111431162B (en) | 2023-09-01 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4489239A (en) * | 1982-09-24 | 1984-12-18 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Portable remote laser sensor for methane leak detection |
| CN101532986A (en) * | 2009-04-10 | 2009-09-16 | 中国矿业大学 | Low power consumption wireless gas detecting device |
| CN202048374U (en) * | 2010-10-13 | 2011-11-23 | 彭映斌 | Energy-saving multifunctional integral mining lamp |
| CN102662175A (en) * | 2012-05-04 | 2012-09-12 | 山东华辰泰尔信息科技股份有限公司 | Laser radar device for measuring mine gas concentration distribution and working method thereof |
| CN108709870A (en) * | 2017-12-26 | 2018-10-26 | 重庆光可巡科技有限公司 | A kind of coal mine of high-precision and high-stability CH_4 detection alarm |
| CN108847004A (en) * | 2018-06-29 | 2018-11-20 | 合肥静美图文科技有限公司 | A kind of non-contact gas monitoring device based on wireless communication |
| CN109470825A (en) * | 2018-12-26 | 2019-03-15 | 南京北路自动化系统有限责任公司 | A kind of low-power consumption methane transducer of remote power-feeding |
-
2020
- 2020-03-20 CN CN202010201632.XA patent/CN111431162B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4489239A (en) * | 1982-09-24 | 1984-12-18 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Portable remote laser sensor for methane leak detection |
| CN101532986A (en) * | 2009-04-10 | 2009-09-16 | 中国矿业大学 | Low power consumption wireless gas detecting device |
| CN202048374U (en) * | 2010-10-13 | 2011-11-23 | 彭映斌 | Energy-saving multifunctional integral mining lamp |
| CN102662175A (en) * | 2012-05-04 | 2012-09-12 | 山东华辰泰尔信息科技股份有限公司 | Laser radar device for measuring mine gas concentration distribution and working method thereof |
| CN108709870A (en) * | 2017-12-26 | 2018-10-26 | 重庆光可巡科技有限公司 | A kind of coal mine of high-precision and high-stability CH_4 detection alarm |
| CN108847004A (en) * | 2018-06-29 | 2018-11-20 | 合肥静美图文科技有限公司 | A kind of non-contact gas monitoring device based on wireless communication |
| CN109470825A (en) * | 2018-12-26 | 2019-03-15 | 南京北路自动化系统有限责任公司 | A kind of low-power consumption methane transducer of remote power-feeding |
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