CN113625043B - Feed state detection method for active and passive fusion detection - Google Patents
Feed state detection method for active and passive fusion detection Download PDFInfo
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- CN113625043B CN113625043B CN202110937659.XA CN202110937659A CN113625043B CN 113625043 B CN113625043 B CN 113625043B CN 202110937659 A CN202110937659 A CN 202110937659A CN 113625043 B CN113625043 B CN 113625043B
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- 238000001514 detection method Methods 0.000 title claims abstract description 71
- 230000004927 fusion Effects 0.000 title claims abstract description 9
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 5
- 230000001629 suppression Effects 0.000 claims abstract description 5
- 230000001052 transient effect Effects 0.000 claims abstract description 5
- 230000003287 optical effect Effects 0.000 claims description 14
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 239000003245 coal Substances 0.000 abstract description 11
- 230000005611 electricity Effects 0.000 abstract description 2
- 238000005065 mining Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
- G01R19/155—Indicating the presence of voltage
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/10—Nuclear fusion reactors
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Abstract
The invention relates to a feed state detection method for active and passive fusion detection, and belongs to the technical field of electronics. The two ends of IN1 and IN2 are used as input signals, and are active signals of alternating voltage below 1500V or passive contact signals with on/off states only; the model of the operational amplifier A1 is the same as the model of the operational amplifier A2, the model of the optocouplers U1, U2 and U3 are the same, the MCU is a singlechip, the models of the bidirectional transient suppression diodes TVS 1-TVS 4 are the same, and the direct-current power supply VDC and the operational amplifier A1 and A2 are respectively protected. The invention provides a passive detection method for indirectly detecting whether the underground power equipment of the coal mine has electricity or not by detecting the on-off state of the auxiliary contact of the mining feed switch, and simultaneously fuses an active detection method and a passive detection method in one sensor, so that one sensor can be suitable for all voltage levels underground the coal mine.
Description
Technical Field
The invention belongs to the technical field of electronics, and relates to a feed state detection method for active and passive fusion detection.
Background
When the underground gas concentration of the coal mine exceeds a specified value or the air is stopped, power equipment in the related area must be immediately powered off. This is the basic function of the coal mine gas monitoring system, so that it is necessary to detect the feeding state of the underground coal mine power equipment.
The power supply of the underground power equipment of the coal mine is often provided by an explosion-proof feed switch, namely, the power on or off of the output end of the feed switch can represent the power on or off of the corresponding power equipment. And similarly, the power equipment can be controlled to be electrified or powered off by controlling the feed switch to be closed or closed. The power equipment feed switch of a certain area is also generally arranged in a centralized manner in a distribution chamber adjacent to the area, and the method for detecting whether the power equipment feed switch is powered or not has the advantages of being few in wiring, convenient to operate and the like, and is a mode commonly adopted in underground coal mines at present.
Regarding the feed state detection, a mode of detecting the voltage of the output terminal of the feed switch (active detection mode) and a mode of detecting the on-off state of the auxiliary contact of the feed switch (passive detection mode) are now commonly used. The active detection mode is generally applicable to 1140V and below voltage levels such as 660V, 380V, 127V and the like. The passive detection method is used for voltage classes of 3300V and above, such as 6KV, 10KV and the like. The high-voltage power supply is characterized in that a plurality of safety protection regulations exist on the high-voltage electric appliance, the voltage is not conveniently measured directly by adopting a low-cost scheme, and in turn, the on-off state of an auxiliary contact of the high-voltage feed switch is detected, so that whether the feed switch supplies power to the power equipment is indirectly judged.
Through inquiry, the prior patent technology related to the underground feed state detection of the coal mine only has a few patents related to an active detection method, and no patent technology related to a passive detection method exists. It is obvious that the prior art breaks the two methods of active detection and passive detection, and realizes the two methods on two different sensors respectively, which brings a certain degree of trouble to practical application.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a feeding state detection method for active and passive fusion detection.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the feed state detection method for active and passive fusion detection uses two ends of IN1 and IN2 as input signals, both of which are active signals with alternating voltage below 1500V or passive contact signals with on/off states only;
resistance r2=r4=r5=r7=r10=r12;
resistors r1=r3, r6=r11, r8 < R13;
the resistor r9=r14 is a resistor smaller than the resistance value of R1;
The model of the operational amplifier A1 is the same as the model of the operational amplifier A2, the model of the optocouplers U1, U2 and U3 are the same, the MCU is a singlechip, the models of the bidirectional transient suppression diodes TVS 1-TVS 4 are the same, and the direct-current power supply VDC and the operational amplifier A1 and A2 are respectively protected;
When the active voltage signal is selected to be accessed, the optical coupler U1 is controlled to be in a conducting state by the MCU, namely the power supply voltage of +/-12V is short-circuited before entering the detection circuit, and the detected signal enters the detection circuit; the detection circuit reduces the voltage of a detected signal through voltage dividing resistors (R5 and R6) and then enters an operational amplifier to form a differential amplification circuit, and meanwhile negative feedback is formed through a resistor R8, so that the differential mode gain is increased, and the common mode interference is reduced; when voltages are arranged at the two ends of the IN1 and the IN2 and are higher than 100V, the operational amplifier A1 outputs a high level, the optical coupler U2 is conducted, and an active detection signal sent to the MCU is a low level; when no voltage exists at the two ends of the IN1 and the IN2 or the voltage is lower than 50V, the operational amplifier A1 outputs a low level, the optical coupler U2 is cut off, and an active detection signal sent to the singlechip MCU is a high level;
When the passive contact signal is selected to be accessed, the optocoupler U1 is controlled to be in a cut-off state by the MCU, namely a power voltage of +/-12V enters the detection circuit; the +12V is connected with the +reference end of the operational amplifier A2 through a voltage dividing circuit formed by the resistors R1, R2, R10 and R11, and the-12V is connected with the-reference end of the operational amplifier A2; when the two ends of the IN1 and the IN2 are disconnected, the operational amplifier A2 outputs a high level, the optical coupler U3 is conducted, and an active detection signal sent to the MCU is a low level; when the two ends of IN1 and IN2 are connected, as the + -reference end of the operational amplifier A2 is short-circuited and the differential pressure is zero, the operational amplifier A2 outputs a low level, the optical coupler U3 is cut off, and an active detection signal sent into the singlechip MCU is a high level.
Optionally, the resistors R2, R4, R5, R7, R10 and R12 in the circuit are all megaohm resistors;
the resistors R1, R3, R6, R11, R8 and R13 are kiloohm resistors;
resistors R9 and R14 are kilo-ohm resistors.
The invention has the beneficial effects that:
(1) The invention provides a passive detection method for indirectly detecting whether the underground power equipment of the coal mine has electricity or not by detecting the on-off state of the auxiliary contact of the mining feed switch, and simultaneously fuses an active detection method and a passive detection method in one sensor, so that one sensor can be suitable for all voltage levels underground the coal mine.
(2) In the invention, the feeding state sensor is simple and convenient to select aiming at various voltage levels from low voltage to high voltage under the coal mine without selecting different feeding sensors; the stock quantity of spare parts can be obviously reduced due to single model.
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 objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:
Fig. 1 is a schematic diagram of a feed state detection method for active and passive fusion detection.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present invention, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
As shown in fig. 1. Input signals are provided at both ends of the IN1 and the IN2, and the input signals may be an alternating voltage (active signal) of 1500V or less, or may be passive contact signals having on/off states only. The resistance r2=r4=r5=r7=r10=r12 and the resistance in the circuit is very large in megaohm level; the resistance r1=r3, r6=r11, R8 < R13 and the resistance is small in kiloohm level; r9=r14 is a kilo-ohm resistor with a smaller resistance value. The model of the operational amplifier A1 is the same as the model of the operational amplifier A2, the model of the optocouplers U1, U2 and U3 are the same, the MCU is a singlechip, the models of the bidirectional transient suppression diodes TVS 1-TVS 4 are the same, and the bidirectional transient suppression diodes protect the direct-current power supply VDC and the operational amplifier A1 and A2 respectively.
When the active voltage signal is selected to be accessed, the optocoupler U1 is controlled to be in a conducting state by the MCU, namely the + -12V power supply voltage is short-circuited before entering the detection circuit, and the detected signal enters the detection circuit. The detection circuit reduces the voltage of the detected signal through the voltage dividing resistors (R5 and R6) and then enters the operational amplifier to form a differential amplifying circuit, and meanwhile negative feedback is formed through the resistor R8, so that the differential mode gain is increased, and the common mode interference is reduced. When voltages are arranged at two ends of the IN1 and the IN2 and are higher (higher than 100V), the operational amplifier A1 outputs a high level, the optical coupler U2 is conducted, and an active detection signal sent to the MCU is a low level; when the voltage is not available or is lower (lower than 50V) at the two ends of the IN1 and the IN2, the operational amplifier A1 outputs a low level, the optical coupler U2 is cut off, and an active detection signal sent to the MCU is a high level.
When the passive contact signal is selected to be accessed, the optocoupler U1 is controlled to be in a cut-off state by the MCU, namely, a power voltage of +/-12V enters the detection circuit. The +12V is connected to the +reference end of the operational amplifier A2 through a voltage dividing circuit formed by the resistors R1, R2, R10 and R11, and the-12V is connected to the-reference end of the operational amplifier A2. When the two ends of the IN1 and the IN2 are disconnected, the operational amplifier A2 outputs a high level, the optical coupler U3 is conducted, and an active detection signal sent to the MCU is a low level; when the two ends of IN1 and IN2 are connected, as the + -reference end of the operational amplifier A2 is short-circuited and the differential pressure is zero, the operational amplifier A2 outputs a low level, the optical coupler U3 is cut off, and an active detection signal sent into the singlechip MCU is a high level.
As shown IN FIG. 1, IN fact, no matter the two ends of IN1 and IN2 are active voltage signals or passive contact signals, the two detection loops A1 and A2 are IN a working state, but because R8 is smaller than R13, the amplification factors of the two detection loops are different, namely, the detection loop A1 is low IN amplification factor and the detection loop A2 is high IN amplification factor, so that the two loops output different high-low level signals when the active signals and the passive signals are respectively connected. The specific working conditions are shown in table 1.
Table 1 working state table of fusion detection loop
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (1)
1. A feed state detection method for active and passive fusion detection is characterized in that: the two ends of IN1 and IN2 are used as input signals, and are active signals of alternating voltage below 1500V or passive contact signals with on/off states only;
the model of the operational amplifier A1 is the same as the model of the operational amplifier A2, the model of the optocouplers U1, U2 and U3 are the same, the MCU is a singlechip, the models of the bidirectional transient suppression diodes TVS 1-TVS 4 are the same, and the direct-current power supply VDC and the operational amplifiers A1 and A2 are respectively protected;
When the active voltage signal is selected to be accessed, the optical coupler U1 is controlled to be in a conducting state by the MCU, namely the power supply voltage of +/-12V is short-circuited before entering the detection circuit, and the detected signal enters the detection circuit; the detection circuit reduces the voltage of a detected signal through voltage dividing resistors R5 and R6, and then enters an operational amplifier to form a differential amplification circuit, and negative feedback is formed through a resistor R8, so that the differential mode gain is increased, and the common mode interference is reduced; when voltages are arranged at the two ends of the IN1 and the IN2 and are higher than 100V, the operational amplifier A1 outputs a high level, the optical coupler U2 is conducted, and an active detection signal sent to the MCU is a low level; when no voltage exists at the two ends of the IN1 and the IN2 or the voltage is lower than 50V, the operational amplifier A1 outputs a low level, the optical coupler U2 is cut off, and an active detection signal sent to the singlechip MCU is a high level;
When the passive contact signal is selected to be accessed, the optocoupler U1 is controlled to be in a cut-off state by the MCU, namely a power voltage of +/-12V enters the detection circuit; the +12V is connected with the +reference end of the operational amplifier A2 through a voltage dividing circuit formed by the resistors R1, R2, R10 and R11, and the-12V is connected with the-reference end of the operational amplifier A2; when the two ends of the IN1 and the IN2 are disconnected, the operational amplifier A2 outputs a high level, the optical coupler U3 is conducted, and an active detection signal sent to the MCU is a low level; when the two ends of IN1 and IN2 are connected, as the + -reference end of the operational amplifier A2 is short-circuited, the differential pressure is zero, the operational amplifier A2 outputs a low level, the optical coupler U3 is cut off, and an active detection signal sent into the singlechip MCU is a high level;
The resistors R2, R4, R5, R7, R10 and R12 in the circuit are megaohm resistors;
the resistors R1, R3, R6, R11, R8 and R13 are kiloohm resistors;
Resistors R9 and R14 are kilo-ohm resistors;
resistance r2=r4=r5=r7=r10=r12;
Resistors r1=r3, r6=r11, r8 < R13;
Resistance r9=r14 < R1;
when the measured signals at the two ends of IN1 and IN2 are active voltage signals:
The state of the detected signal is high voltage, the output of the active detection signal U2 is low level, the output of the passive detection signal U3 is low level, and the feeding state is powered;
The state of the detected signal is low voltage, the active detection signal U2 is output to be high level, the passive detection signal U3 is output to be low level, and the feeding state is electroless;
the state of the detected signal is zero voltage, the active detection signal U2 is output to be high level, the passive detection signal U3 is output to be high level, and the feeding state is electroless;
when the measured signals at the two ends of IN1 and IN2 are passive contact signals:
The state of the detected signal is on, the active detection signal U2 is output to be high level, the passive detection signal U3 is output to be high level, and the feeding state is powered on;
The state of the detected signal is off, the active detection signal U2 is output to be high level, the passive detection signal U3 is output to be low level, and the feeding state is electroless.
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| CN202110937659.XA CN113625043B (en) | 2021-08-16 | 2021-08-16 | Feed state detection method for active and passive fusion detection |
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| CN113625043B true CN113625043B (en) | 2024-04-19 |
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| CN202677125U (en) * | 2012-07-06 | 2013-01-16 | 天津中煤电子信息工程有限公司 | Switching-off controller |
| CN103792417A (en) * | 2014-02-28 | 2014-05-14 | 国家电网公司 | Active and passive dual-mode sensing high-voltage presence indication device and implementation method thereof |
| CN204089159U (en) * | 2014-07-04 | 2015-01-07 | 中煤张家口煤矿机械有限责任公司 | The undetected protective circuit of a kind of underground coal mine mains lighting supply |
| CN209167865U (en) * | 2018-12-03 | 2019-07-26 | 珠海派诺科技股份有限公司 | A kind of On-off signal detection circuit and monitoring system |
| DE102019101636A1 (en) * | 2019-01-23 | 2020-07-23 | Bender Gmbh & Co. Kg | Electrical circuit device for the detection of a non-opened switch contact and a protective conductor interruption in a single or multi-phase electrical supply line |
| CN213303939U (en) * | 2020-11-17 | 2021-05-28 | 长春东煤高技术股份有限公司 | Mining remote feed breaker |
-
2021
- 2021-08-16 CN CN202110937659.XA patent/CN113625043B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202677125U (en) * | 2012-07-06 | 2013-01-16 | 天津中煤电子信息工程有限公司 | Switching-off controller |
| CN103792417A (en) * | 2014-02-28 | 2014-05-14 | 国家电网公司 | Active and passive dual-mode sensing high-voltage presence indication device and implementation method thereof |
| CN204089159U (en) * | 2014-07-04 | 2015-01-07 | 中煤张家口煤矿机械有限责任公司 | The undetected protective circuit of a kind of underground coal mine mains lighting supply |
| CN209167865U (en) * | 2018-12-03 | 2019-07-26 | 珠海派诺科技股份有限公司 | A kind of On-off signal detection circuit and monitoring system |
| DE102019101636A1 (en) * | 2019-01-23 | 2020-07-23 | Bender Gmbh & Co. Kg | Electrical circuit device for the detection of a non-opened switch contact and a protective conductor interruption in a single or multi-phase electrical supply line |
| CN213303939U (en) * | 2020-11-17 | 2021-05-28 | 长春东煤高技术股份有限公司 | Mining remote feed breaker |
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