CN112880748B - Water environment monitoring device based on Internet of things - Google Patents
Water environment monitoring device based on Internet of things Download PDFInfo
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- CN112880748B CN112880748B CN202110281126.0A CN202110281126A CN112880748B CN 112880748 B CN112880748 B CN 112880748B CN 202110281126 A CN202110281126 A CN 202110281126A CN 112880748 B CN112880748 B CN 112880748B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 234
- 238000012806 monitoring device Methods 0.000 title claims abstract description 8
- 238000012544 monitoring process Methods 0.000 claims abstract description 228
- 239000003990 capacitor Substances 0.000 claims abstract description 69
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 26
- 229910052710 silicon Inorganic materials 0.000 claims description 26
- 239000010703 silicon Substances 0.000 claims description 26
- 230000002441 reversible effect Effects 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 230000006854 communication Effects 0.000 description 15
- 230000000670 limiting effect Effects 0.000 description 8
- 239000000969 carrier Substances 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- 230000005856 abnormality Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- 101100484947 Arabidopsis thaliana VQ10 gene Proteins 0.000 description 1
- 238000004883 computer application Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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- G—PHYSICS
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- G—PHYSICS
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- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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- G—PHYSICS
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- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
- G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
- G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
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Abstract
The invention discloses a water environment monitoring device based on the Internet of things, which comprises an amplitude monitoring circuit, a frequency conversion circuit, a frequency monitoring circuit and a control early warning circuit, wherein the amplitude of a water environment monitoring signal is detected by using the charging voltage of a capacitor C3, the change value of the amplitude of the water environment monitoring signal is monitored by using operational amplifiers AR4-AR5, the frequency of the water environment monitoring signal is converted into a corresponding direct current voltage value by using a frequency sensor J1, the output of the frequency sensor J1 is sequentially compared with a lower standard voltage value limit 1, an upper standard voltage value limit 1, a lower standard voltage value limit 2 and a standard voltage value upper standard voltage value limit 2 by using operational amplifiers AR7-AR10, the change value of the frequency of the water environment monitoring signal is monitored, a red light emitting diode D3 is adopted to emit a red light warning when the intensity of the water environment monitoring signal is interfered enough to change the amplitude and the frequency characteristics, the accuracy of the water environment monitoring signal is reminded, and the error analysis result of a plurality of water sample index data is prevented.
Description
Technical Field
The invention relates to the technical field of monitoring, in particular to a water environment monitoring device based on the Internet of things.
Background
The water environment monitoring is a main way and means for knowing and mastering the water environment quality of a watershed and the discharge of a water pollution source, the result is one of important bases of water pollution control and environmental management decision, the water environment monitoring system based on the Internet of things is a technology integrating a sensor, communication, computer application, a geographic information system and the like, the automatic water environment monitoring generally uses network technology supervision to cover nationwide water resource monitoring sites, different areas of the watershed are taken as monitoring units, the indexes such as flow, flow speed, water level, turbidity, PH value, conductivity, heavy metal, microorganisms and the like in the watershed are detected by detecting equipment such as the sensor at regular time and quantitatively, index data of the water sample are modulated into water environment monitoring signals, the water environment monitoring signals are transmitted to a water environment monitoring signal receiver through wireless communication, the received water environment monitoring signals are transmitted to a water environment monitoring signal demodulator for demodulation, and the index data of the water sample are restored to be transmitted to a monitoring center so as to analyze the index data of a plurality of water samples;
however, in thunderstorm and lightning weather, because the intensity of thunder is very high, even if the thunder is far away from a thunder area, the interference field intensity is considerable, the interference generated by far away thunder is fluctuant, the nearby thunder interference is pulse, the fluctuation interference can generate intense shaking of the waveform of the water environment monitoring signal and generate numerous clutters with strong energy, the pulse interference can generate obvious pulse burrs on the waveform of the water environment monitoring signal, such as an abnormally high level signal and an abnormally low level signal, the frequency of the water environment monitoring signal is also suddenly changed, and the strong electromagnetic interference is enough to change the amplitude and the frequency characteristics of the water environment monitoring signal in the wireless transmission process, so that the water environment monitoring signal demodulator cannot demodulate and cannot restore the original water sample index data;
when equipment with high transmitting power and large electromagnetic energy such as a large nuclear power station, broadcasting, navigation and radar exists in the surrounding environment, the transmitting power of a broadcasting television signal reaches tens of kilowatts, the transmitting power of a remote pulse radar can reach more than tens of megawatts, and resonant transmitting and parasitic transmitting can be generated by the transmitting of the remote pulse radar, so that very wide frequency bands or discrete frequency spectrums are occupied, intermodulation interference is easily generated between the electromagnetic interference and a water environment monitoring signal, and the intermodulation interference is enough to change the frequency of part of the water environment monitoring signal, so that a water environment monitoring signal demodulator cannot accurately restore water sample index data;
and the water sample index data restored by the water environment monitoring signal demodulator is in error, and when the water environment monitoring center analyzes the multiple pieces of water sample index data, an error analysis result is obtained, so that an error water environment management decision is made.
Disclosure of Invention
Aiming at the situation, the invention aims to provide the water environment monitoring device based on the Internet of things, which can give out a warning when the intensity of the water environment monitoring signal subjected to interference is enough to change the amplitude and frequency characteristics of the water environment monitoring signal, remind a water environment monitoring center of verifying the accuracy of the water environment monitoring signal and prevent a plurality of water sample index data from being analyzed to obtain an incorrect analysis result.
The technical scheme includes that the monitoring and early warning system comprises detection equipment, a water environment monitoring signal modulation transmitter, a water environment monitoring signal receiver, a monitoring and early warning module and a water environment monitoring center, wherein the detection equipment detects water quality indexes of a watershed water sample at regular time and quantity to obtain water sample index data, the water environment monitoring signal modulation transmitter carries out 2FSK modulation on the water sample index data to obtain a water environment monitoring signal and transmits the water environment monitoring signal to the water environment monitoring signal receiver, the monitoring and early warning module samples the water environment monitoring signal received by the water environment monitoring signal receiver to carry out amplitude monitoring and frequency monitoring, and if the amplitude and the frequency of the water environment monitoring signal are severely distorted, a red light warning is sent to remind the water environment monitoring center of verifying the accuracy of the water environment monitoring signal, and the monitoring and early warning module comprises an amplitude monitoring circuit, a frequency conversion circuit, a frequency monitoring circuit and a control early warning circuit;
the amplitude monitoring circuit samples the water environment monitoring signal output by the water environment monitoring signal receiver, the operational amplifier AR2 inverts the negative half cycle of the water environment monitoring signal, the capacitor C3 is charged by the water environment monitoring signal, the amplitude of the water environment monitoring signal is detected by the charging voltage of the capacitor C3, the operational amplifier AR4 is used for carrying out subtraction proportion operation on the amplitude of the water environment monitoring signal and the amplitude of the water environment monitoring signal, if the obtained amplitude abnormal difference value is larger than the amplitude of the water environment monitoring signal, the operational amplifier AR5 outputs a high level, the frequency conversion circuit samples the water environment monitoring signal output by the water environment monitoring signal receiver, the frequency sensor J1 with the model number of WBF122U01 is selected for converting the frequency of the water environment monitoring signal into a corresponding direct current voltage value in real time, and when the charging voltage on the capacitor C6 reaches the control electrode conducting voltage of the silicon controlled rectifier Q10, the frequency monitoring circuit uses the operational amplifier AR9-AR10 to compare the direct current voltage value corresponding to the water environment monitoring signal with the lower limit 1 and the upper limit 1 of the standard voltage value, the triode Q9 is conducted when the operational amplifier AR9 outputs low level, the direct current voltage value corresponding to the water environment monitoring signal is compared with the lower limit 2 and the upper limit 2 of the standard voltage value by using the operational amplifier AR7-AR8 when the operational amplifier AR9 outputs high level, the triode Q6 is conducted when the operational amplifier AR7 outputs low level, the triode Q5 is conducted when the operational amplifier AR8 outputs high level, the triode Q7 is conducted when the operational amplifier AR6 outputs high level, the control early warning circuit uses the voltage value obtained by dividing the voltage on the capacitor C5 and the resistors R16-R17 to compare, the triode Q3 is conducted when the output of the operational amplifier AR6 reaches the control electrode conducting voltage of the controllable silicon Q4, if the operational amplifier AR5 outputs a high level at this time, the triode Q2 is also turned on, and the red light emitting diode D3 emits a red light warning;
the control early warning circuit comprises a triode Q5, the base electrode of the triode Q5 is connected with the base electrode of the triode Q6 and the in-phase input end of a resistor R19 and the other end of a capacitor C5, the contact 2 of the relay K2 is connected with the other end of the resistor R7, the other end of the resistor R15 is connected with the contact 1 of a relay K2 and the other end of a capacitor C5, the contact 4 of the relay K2 is grounded and the other end of the resistor R19 is connected with the other end of the capacitor C5, the reverse input end of the resistor R6 is connected with the other end of the resistor R16 and the resistor R17, the other end of the resistor R16 is connected with the contact 3V of a relay K2, the other end of the resistor R17 is grounded, the output end of the resistor R6 is connected with one end of the resistor R15, the other end of the resistor R15 is connected with the other end of the resistor R4, the other end of the resistor R3 is connected with the resistor R3, and the other end of the resistor R3 is connected with the resistor R3, the resistor Q2 is connected with the resistor Q3, the other end of the resistor Q2 is connected with the resistor C3, the resistor Q3, the other end of the resistor Q3 is connected with the resistor Q3, the other end is connected with the resistor R3, and the other end of the resistor Q3 is connected with the other end, the other end of the resistor is and the other end is connected with the resistor is and the other end, the other end is and the terminal is the terminal.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages:
1. performing subtraction proportion operation on the amplitude of the water environment monitoring signal and the amplitude of the water environment monitoring signal, and if the obtained amplitude anomaly difference is larger than the amplitude of the water environment monitoring signal, indicating that the intensity of interference of the water environment monitoring signal in the 2FSK wireless carrier communication process is enough to change the amplitude of the water environment monitoring signal;
if the direct current voltage value output by the frequency sensor J1 is smaller than the lower limit 1 and the upper limit 1 of the standard voltage value, the condition that the water environment monitoring signal is interfered in the 2FSK wireless carrier communication process so that the frequency of the water environment monitoring signal is changed is indicated, and the direct current voltage value corresponding to the frequency is smaller; if the direct current voltage value output by the frequency sensor J1 is greater than the lower limit 2 and the upper limit 2 of the standard voltage value, the condition that the water environment monitoring signal is interfered in the 2FSK wireless carrier communication process so that the frequency of the water environment monitoring signal is changed is indicated, and the direct current voltage value corresponding to the frequency is increased; if the direct current voltage value output by the frequency sensor J1 is greater than the lower limit 1 and the upper limit 1 of the standard voltage value and is smaller than the lower limit 2 and the upper limit 2 of the standard voltage value, the frequency of the water environment monitoring signal is converted between two carriers used for 2FSK modulation, but if the operational amplifier AR6 outputs a high level, the conversion duration between the two carriers used for 2FSK modulation of the frequency of the water environment monitoring signal is longer than the reaction duration of the frequency sensor J1, the water environment monitoring signal is interfered in the 2FSK wireless carrier communication process, and the frequency of the water environment monitoring signal is changed;
as long as the water environment monitoring signal is interfered in the 2FSK wireless carrier communication process to cause one of three conditions of frequency change of the water environment monitoring signal, and the water environment monitoring signal is interfered in the 2FSK wireless carrier communication process to cause the amplitude change of the water environment monitoring signal to occur simultaneously, the strong electromagnetic interference is indicated to cause the amplitude and frequency characteristics of the water environment monitoring signal to be changed in the wireless transmission process, the water environment monitoring signal demodulator cannot accurately restore the water sample index data completely, and at the moment, the red light emitting diode D3 is used for emitting a red light warning to remind the water environment monitoring center to verify the accuracy of the water environment monitoring signal so as to prevent erroneous analysis results from being obtained when analyzing multiple pieces of water sample index data.
2. The function of setting the lower standard voltage value limit 1, the upper standard voltage value limit 1, the lower standard voltage value limit 2 and the upper standard voltage value limit 2 is to prevent the red light warning from being sent by the control early warning circuit when the fluctuation range of the water environment monitoring signal is smaller and the amplitude and the frequency characteristics of the water environment monitoring signal are not influenced.
Drawings
Fig. 1 is a schematic circuit diagram of a water environment monitoring device based on the internet of things.
Detailed Description
The foregoing and other features, aspects and advantages of the present invention will become more apparent from the following detailed description of the embodiments, which proceeds with reference to the accompanying fig. 1. The following embodiments are described in detail with reference to the drawings.
The water environment monitoring device based on the Internet of things comprises detection equipment, a water environment monitoring signal modulation transmitter, a water environment monitoring signal receiver, a monitoring and early warning module and a water environment monitoring center, wherein the monitoring and early warning module comprises an amplitude monitoring circuit, a frequency conversion circuit, a frequency monitoring circuit and a control early warning circuit; the detection equipment comprises a plurality of water quality indexes such as flow rate sensor, water level sensor and PH value sensor, corresponding water quality indexes such as flow rate, water level and PH value in the watershed water sample are detected regularly and quantitatively to obtain a plurality of water sample index data, each water sample index data adopts an independent water environment monitoring signal modulation transmitter to carry out 2FSK modulation on the water sample index data to obtain a water environment monitoring signal corresponding to the water sample index data, the water environment monitoring signal is transmitted to a water environment monitoring signal receiver, a monitoring early warning module samples the water environment monitoring signal received by the water environment monitoring signal receiver to carry out amplitude monitoring and frequency monitoring, and if the amplitude and the frequency of the water environment monitoring signal are severely distorted, a red light warning is sent to remind a water environment monitoring center to verify the accuracy of the water environment monitoring signal corresponding to the water sample index data.
In order to monitor whether the strength of the water environment monitoring signal subjected to interference in the 2FSK wireless carrier communication process is enough to change the amplitude of the water environment monitoring signal, an amplitude monitoring circuit is adopted, the water environment monitoring signal output by a water environment monitoring signal receiver is sampled, the water environment monitoring signal is compared with the ground by using an operational amplifier AR1, when the water environment monitoring signal is in a positive half cycle, the operational amplifier AR1 outputs a negative level, a relay K1 is not conducted, the positive half cycle of the water environment monitoring signal is communicated with a contact 1 through a contact 3 of the relay K1 and is transmitted in two ways, one way is transmitted to one end of a resistor R11, the other way is transmitted to a pi-type filter network formed by using resistors R5-R6, a capacitor C1-C2 and an inductor L2 for filtering direct current interference in the water environment monitoring signal, the capacitor C1 and the resistor R5 form a high-pass filter, the low-frequency interference signal is dropped to the ground by the capacitor C2 and the resistor R6 form a low-pass filter, the resistance value of the resistor R6 is small, so that the loss of the water environment monitoring signal is reduced, the water environment monitoring signal is slightly charged by the positive half cycle of the capacitor C1, the water environment monitoring signal is discharged to the capacitor C1, and the capacitor C1 is slightly charged to the cut off;
when the water environment monitoring signal is in a negative half cycle, the operational amplifier AR1 outputs a positive level, the relay K1 is conducted, the negative half cycle of the water environment monitoring signal is communicated with the contact 2 through the contact 3 of the relay K1 and is transmitted to an inverting circuit formed by the operational amplifier AR2 and the resistors R2-R4, wherein the proportionality coefficient of the inverting circuit is determined by the ratio of the resistor R3 to the resistor R4, the proportionality coefficient is 1, after the negative half cycle of the water environment monitoring signal is inverted through the inverting circuit, the operational amplifier AR2 outputs a positive half cycle of the water environment monitoring signal to be transmitted in two paths, one path is transmitted to one end of the resistor R11, the other path is transmitted to a pi-type filter network formed by the resistors R5-R6, the capacitors C1-C2 and the inductor L2, when the water environment monitoring signal filtered by the pi-type filter network is larger than the charging voltage on the capacitor C3, the diode D1 is conducted to charge the peak value of the capacitor C3, the voltage on the capacitor C3 is enabled to continuously reach the peak value of the water environment monitoring signal, the peak value of the water environment monitoring signal is repeatedly utilized to detect the water environment monitoring signal, and the amplitude of the water environment monitoring signal is detected; the capacitor C3 is charged twice in one period of the raw water environment monitoring signal, so that the amplitude of the real-time detected water environment monitoring signal is more accurate;
filtering the water environment monitoring signal before amplitude detection by using a pi-type filtering network so as to prevent interference signals from affecting the detected amplitude of the water environment monitoring signal and further improve the accuracy of the amplitude of the water environment monitoring signal; the operational amplifier AR3 performs voltage following action; the inductor L1 plays a role in isolating direct-current intersection, and the resistor R1 plays a role in current limiting;
when the water environment monitoring signal is positive half cycle, the sum of the amplitude of the water environment monitoring signal and the power supply +0.7V is subjected to subtraction proportion operation, the proportion coefficient is determined by the ratio of the resistor R8 to the resistor R9, the proportion coefficient is 1, the power supply +0.7V is used for compensating the pipe pressure drop of the diode D1, if the amplitude abnormality difference value output by the operational amplifier AR4 is positive level, the amplitude abnormality difference value output by the operational amplifier AR5 is compared with the amplitude of the water environment monitoring signal, if the amplitude abnormality difference value output by the operational amplifier AR4 is larger than the amplitude of the water environment monitoring signal, the positive half cycle of the water environment monitoring signal has abnormal high level, namely the strength of the water environment monitoring signal subjected to interference in the 2FSK wireless carrier communication process is enough to change the amplitude of the water environment monitoring signal, and the operational amplifier AR5 outputs high level; when the raw water environment monitoring signal is a negative half cycle, the raw water environment monitoring signal is converted into a positive half cycle of the water environment monitoring signal through an inverting circuit, the sum of the amplitude of the water environment monitoring signal and the power +0.7V after the conversion of the inverting circuit is subjected to subtraction proportion operation, if the amplitude abnormal difference value output by the operational amplifier AR4 is a positive level, the amplitude abnormal difference value output by the operational amplifier AR4 is compared with the amplitude of the water environment monitoring signal by using the operational amplifier AR5, if the amplitude abnormal difference value output by the operational amplifier AR4 is larger than the amplitude of the water environment monitoring signal, the negative half cycle of the raw water environment monitoring signal is provided with an abnormal low level, namely the amplitude of the water environment monitoring signal is sufficiently changed due to interference in the 2FSK wireless carrier communication process, and the operational amplifier AR5 outputs a high level.
In order to convert the water environment monitoring signal into a corresponding direct current voltage value in real time, a frequency monitoring circuit is used as a basis, meanwhile, the direct current voltage value output by the frequency sensor J1 when the power is just on is prevented from interfering the frequency monitoring circuit, the frequency conversion circuit is adopted to sample the water environment monitoring signal output by the water environment monitoring signal receiver, the frequency sensor J1 with the model of WBF122U01 is selected to convert the frequency of the water environment monitoring signal into the corresponding direct current voltage value in real time, and the voltage stabilizing diode D4 is used for stabilizing voltage, the inductor L3 is used for filtering alternating current interference, and the capacitor C7 is used for filtering high-frequency interference;
when the frequency sensor J1 is just electrified, the output of the frequency sensor is increased from zero, meanwhile, the power supply +6V starts to charge the capacitor C6 through the resistor R24, the relay K3 is not conducted at this time, the direct-current voltage value output by the frequency sensor J1 is connected with the contact 2 through the contact 1 of the relay K3 and falls to the ground through the side of the current limiting resistor R23 until the charging voltage on the capacitor C6 reaches the conducting voltage of the control electrode of the silicon controlled rectifier Q10, the relay K3 is always conducted, and the direct-current voltage value output by the frequency sensor J1 is continuously transmitted to the non-inverting input end of the operational amplifier AR9 and the collector electrode of the triode Q8 in the frequency monitoring circuit through the contact 1 of the relay K3;
the time for the charge voltage on capacitor C6 to reach the turn-on voltage of the control electrode of thyristor Q10Wherein the method comprises the steps of VQ10 The on voltage of the control electrode of the silicon controlled rectifier Q10 is also the reaction time of the frequency sensor J1, namely the time when the frequency sensor J1 is just powered up and is increased to the first stable voltage value from zero, so that the direct current voltage value output by the frequency sensor J1 in the time period is prevented from misjudging the frequency monitoring circuit.
In order to monitor whether the intensity of the interference of the water environment monitoring signal is enough to change the frequency of the water environment monitoring signal in the 2FSK wireless carrier communication process, a frequency monitoring circuit is adopted, when a relay K3 is always conducted, a direct current voltage value corresponding to the water environment monitoring signal output by a frequency sensor J1 is continuously transmitted to an in-phase input end of an operational amplifier AR9 and a collector electrode of a triode Q8 through a contact 1 connecting with a contact 3 of the relay K3, the output of the frequency sensor J1 is sequentially compared with a lower limit 1 of a standard voltage value and an upper limit 1 of the standard voltage value by utilizing an operational amplifier AR9-AR10, if the direct current voltage value output by the frequency sensor J1 is smaller than a lower limit 1 of the standard voltage value and an upper limit 1 of the standard voltage value, the operational amplifier AR9 outputs a negative level, and at the moment, a triode Q9 is conducted, so that the frequency of the water environment monitoring signal is continuously changed by the interference in the 2FSK wireless carrier communication process, the direct current voltage value corresponding to the frequency of the triode Q8 becomes smaller, a controllable silicon Q4 in an early warning control circuit is conducted, a power supply +3.3V is conducted, and the triode Q3 is also conducted to a red light through a current limiting resistor R3, and a high-level Q3 is emitted when the triode Q3 is conducted, and the triode Q3 is turned on, and the triode Q is turned on; if the direct current voltage value output by the frequency sensor J1 is greater than the lower limit 1 of the standard voltage value and less than the upper limit 1 of the standard voltage value, the operational amplifier AR9 outputs a positive level, the triode Q9 is cut off, the operational amplifier AR10 outputs a negative level, the triode Q8 is also cut off, if the direct current voltage value output by the frequency sensor J1 is greater than the lower limit 1 of the standard voltage value and the upper limit 1 of the standard voltage value, the operational amplifier AR9 outputs a positive level, the triode Q9 is cut off, the operational amplifier AR10 outputs a positive level, the triode Q8 is conducted, and the output of the frequency sensor J1 is transmitted to the non-inverting input end of the operational amplifier AR7 through the triode Q8;
comparing the output of the frequency sensor J1 with a lower limit 2 of a standard voltage value and an upper limit 2 of the standard voltage value by using an operational amplifier AR7-AR8, if the direct current voltage value output by the frequency sensor J1 is smaller than the lower limit 2 of the standard voltage value and the upper limit 2 of the standard voltage value, outputting a negative level by the operational amplifier AR7, controlling a triode Q6 in an early warning circuit to be conducted and a triode Q5 to be cut off, outputting a negative level by the operational amplifier AR8, cutting off the triode Q7, if the direct current voltage value output by the frequency sensor J1 is larger than the lower limit 2 of the standard voltage value and smaller than the upper limit 2 of the standard voltage value, outputting a positive level by the operational amplifier AR7, controlling a triode Q6 in the early warning circuit to be turned off, controlling a triode Q8 to be turned on and a red water environment by the triode Q7, and a direct current signal to be turned on by the triode Q3 when the frequency sensor J1 is larger than the lower limit 2 of the standard voltage value and the upper limit 2 of the standard voltage value, and the triode Q7 is turned on by the triode Q8, and the triode Q7 is turned on by the direct current signal to be turned on by the direct current controller, and the triode Q3 is turned on by the direct current 3, and the direct current signal to be turned off by the triode Q3 when the triode Q3 is in the high level, and the direct current signal is turned on by the direct current 3;
the lower limit 1 of the standard voltage value refers to 90% of the smaller direct current voltage value in the direct current voltage values respectively converted by the two carriers through the frequency sensor J1 when the water environment monitoring signal is subjected to 2FSK modulation, and the upper limit 1 of the standard voltage value refers to 110% of the smaller direct current voltage value in the direct current voltage values respectively converted by the two carriers through the frequency sensor J1 when the water environment monitoring signal is subjected to 2FSK modulation; the lower limit 2 of the standard voltage value refers to 90% of the larger direct-current voltage value in the direct-current voltage values respectively converted by the two carriers through the frequency sensor J1 when the water environment monitoring signal is subjected to 2FSK modulation, and the upper limit 2 of the standard voltage value refers to 110% of the larger direct-current voltage value in the direct-current voltage values respectively converted by the two carriers through the frequency sensor J1 when the water environment monitoring signal is subjected to 2FSK modulation.
If the intensity of interference of the water environment monitoring signal in the 2FSK wireless carrier communication process is enough to change the amplitude and frequency of the water environment monitoring signal, in order to prevent a water environment monitoring center from obtaining an error analysis result when analyzing a plurality of water sample index data, a control early warning circuit is adopted, if the direct current voltage value output by a frequency sensor J1 is larger than a standard voltage value lower limit 1 and a standard voltage value upper limit 1 and smaller than a standard voltage value lower limit 2 and a standard voltage value upper limit 2, a triode Q6 is conducted, a triode Q5 is cut off, a power supply +6V charges a capacitor C5 through a resistor R18, when the triode Q6 is cut off and the triode Q5 is conducted, the power supply +6V stops charging the capacitor C5, a relay K2 is conducted, a contact 1 is connected with a contact 2, and the capacitor C5 is rapidly discharged to the ground through a resistor R19;
comparing the charging voltage on the capacitor C5 with the voltage value obtained by dividing the resistor R16-R17 in real time by using the operational amplifier AR6, outputting a high level by the operational amplifier AR6 when the charging voltage on the capacitor C5 is larger than the voltage value obtained by dividing the resistor R16-R17, so that the strength of interference of the water environment monitoring signal in the 2FSK wireless carrier communication process is enough to change the frequency of the water environment monitoring signal, the silicon controlled rectifier Q4 is conducted, the power +3.3V is loaded to the base electrode of the triode Q3 through the silicon controlled rectifier Q4 and the current limiting resistor R13, so that the triode Q3 is conducted, if the operational amplifier AR5 outputs the high level, the triode Q2 is also conducted, the red light emitting diode D3 emits a red light warning, the accuracy of the water environment monitoring signal is reminded of the water environment monitoring center, and the error analysis result of a plurality of water sample index data is prevented from being obtained when the water environment monitoring center is analyzed;
the voltage value obtained by dividing the voltage by the resistors R16-R17 is based onIs provided, wherein V Partial pressure value Namely, the voltage value obtained by dividing the voltage of the resistors R16-R17, and T is the reaction duration of the frequency sensor J1; the capacitor C4 is used for bypassing other interference clutter to ground so as to achieve the purpose of eliminating other interference clutter.
The specific structure of the amplitude monitoring circuit is that the inverting input end of the operational amplifier AR1 is connected with the output port of the water environment monitoring signal receiver, the contact 3 of the relay K1 and the IN port of the frequency sensor J1 IN the frequency conversion circuit, the non-inverting input end of the operational amplifier AR1 is grounded and the contact 5 of the relay K1, the output end of the operational amplifier AR1 is connected with one end of the inductor L1, the other end of the inductor L1 is connected with one end of the resistor R1, the other end of the resistor R1 is connected with the contact 4 of the relay K1, the contact 2 of the relay K1 is connected with one end of the resistor R4, the other end of the resistor R3 is connected with the inverting input end of the operational amplifier AR2, the non-inverting input end of the operational amplifier AR2 is connected with one end of the resistor R2, the other end of the output end of the resistor AR2 is grounded, the contact 1 of the resistor R11 of the relay K1, one end of the capacitor C1 and one end of the inductor L2, the other end of the capacitor C1 is connected with the resistor R5 and one end of the resistor R6, the other end of the resistor R5 is grounded, the other end of the inductor L2 and one end of the capacitor C2 are connected with the other end of the resistor R6 and the anode of the diode D1, the cathode of the diode D1 is connected with one end of the capacitor C3 and the non-inverting input end of the operational amplifier AR3, the other end of the capacitor C3 is grounded, the inverting input end of the operational amplifier AR3 is connected with the output end of the resistor R7, the other end of the resistor R7 is connected with one end of the resistor R8, one end of the resistor R9, the inverting input end of the operational amplifier AR4 and the inverting input end of the operational amplifier AR5, the other end of the resistor R9 is connected with the power supply +0.7V, the other end of the resistor R8 is connected with the output end of the operational amplifier 4 and the anode of the diode D2, the output end of the operational amplifier AR5 is connected with the control electrode of the controllable silicon Q1 IN a control circuit, the other end of the resistor R11 is connected with the non-inverting input end of the operational amplifier AR4 and one end of the resistor R10, the other end of the resistor R10 is grounded.
The specific structure of the frequency conversion circuit is that an IN port of a frequency sensor J1 is connected with an output port of a water environment monitoring signal receiver and a contact 3 of an operational amplifier AR1 IN an amplitude monitoring circuit, a VCC port of the frequency sensor J1 is connected with a power supply +12V, a GND port of the frequency sensor J1 is grounded and an anode of a voltage stabilizing diode D4, one end of a capacitor C7, an OUT port of the frequency sensor J1 is connected with a cathode of the voltage stabilizing diode D4 and one end of an inductor L3, the other end of the inductor L3 is connected with the other end of the capacitor C7 and a contact 1 of the relay K3, a contact 2 of the relay K3 is connected with one end of a resistor R23, the other end of the resistor R23 is grounded, a contact 4 of the relay K3 is connected with a power supply +6V and one end of a resistor R24, the other end of the resistor R24 is connected with a control electrode of a controllable silicon Q10, the other end of the capacitor C6 is grounded and the cathode of the controllable silicon Q10, the anode of the controllable silicon Q10 is connected with a contact 5 of the relay K3, and the other end of the relay K3 is connected with the input end of the operational amplifier AR9 of the same phase of the frequency monitoring circuit.
The specific structure of the frequency monitoring circuit is that the in-phase input end of the operational amplifier AR9 is connected with the collector electrode of the triode Q8 and the contact 3 of the relay K3 of the frequency conversion circuit, the reverse phase input end of the operational amplifier AR9 is connected with the lower limit 1 of the standard voltage value, one end of the resistor R22 and the in-phase input end of the operational amplifier AR10 are connected with the base electrode of the triode Q9, the emitter electrode of the triode Q9 is connected with the +3.3V, the collector electrode of the triode Q9 is connected with the emitter electrode of the triode Q7 and one end of the resistor R15 in the control early warning circuit, the control electrode of the triode Q4 is connected with the reverse phase input end 1 of the standard voltage value, the output end of the operational amplifier AR10 is connected with one end of the resistor R21, the other end of the resistor R21 is connected with the base electrode of the triode Q8, the emitter electrode of the triode Q8 is connected with the in-phase input end of the operational amplifier AR7, the reverse phase input end of the resistor AR7 is connected with the input end 2 of the operational amplifier AR7, the output end of the input end of the triode Q7 is connected with the input end of the resistor R7, the input end of the reverse phase end of the resistor R7 is connected with the input end 20, the input end of the output end of the triode Q7 is connected with the input end of the resistor Q7.
The specific structure of the control early warning circuit is that the base electrode of the triode Q5 is connected with the base electrode of the triode Q6 and the in-phase input end of an operational amplifier AR8 and the output end of an operational amplifier AR7 in the frequency monitoring circuit, the collector electrode of the triode Q5 is connected with a power supply +6V, the emitter electrode of the triode Q5 is connected with a contact 3 of a relay K2, the emitter electrode of the triode Q6 is connected with a power supply +6V, the collector electrode of the triode Q6 is connected with one end of a resistor R18, the other end of the resistor R18 is connected with a contact 1 of the relay K2, one end of a capacitor C5 and the in-phase input end of the operational amplifier AR6, the contact 4 of the relay K2 is grounded, one end of a resistor R19 and the other end of the capacitor C5 are connected with the other end of the resistor R19, the reverse phase input end of the operational amplifier AR6 is connected with a resistor R16 and one end of a resistor R17, the other end of the resistor R16 is connected with a power supply +6V, the other end of the resistor R17 is grounded, and the output end of the operational amplifier AR6 is connected with one end of a resistor R15, the other end of the resistor R15 is connected with the control electrode of the triode Q4 and the collector electrode of the triode Q7 in the frequency monitoring circuit, the anode of the triode Q4 is connected with a power supply +3.3V, the cathode of the triode Q4 is connected with one end of the resistor R13 and one end of the capacitor C4, the other end of the resistor R13 is connected with the base electrode of the triode Q3, the other end of the capacitor C4 is grounded and the emitter electrode of the triode Q3, the collector electrode of the triode Q3 is connected with the emitter electrode of the triode Q2, the collector electrode of the triode Q2 is connected with the cathode of the red light emitting diode D3, the anode of the red light emitting diode D3 is connected with one end of the resistor R14, the other end of the resistor R14 is connected with a power supply +6V, the base electrode of the triode Q2 is connected with one end of the resistor R12, the other end of the resistor R12 is connected with the cathode of the triode Q1, the anode of the triode Q1 is connected with a power supply +3.3V, and the control electrode of the triode Q1 is connected with the output end of the operational amplifier AR5 in the amplitude monitoring circuit.
When the invention is particularly used, the amplitude monitoring circuit samples the water environment monitoring signal output by the water environment monitoring signal receiver, an inverting circuit is formed by using the operational amplifier AR2 and the resistors R2-R4, the negative half cycle of the water environment monitoring signal is inverted, pi-type filter network formed by using the resistors R5-R6, the capacitors C1-C2 and the inductor L2 is used for filtering, direct current interference in the water environment monitoring signal is filtered by the inductor L2, a high-pass filter is formed by the capacitor C1 and the resistor R5, a low-frequency interference signal is bypassed to the ground, a low-pass filter is formed by the capacitor C2 and the resistor R6, the high-frequency interference signal is bypassed to the ground, the capacitor C3 is charged by using the charging voltage of the capacitor C3, the amplitude of the water environment monitoring signal is detected, a subtraction proportion operation circuit is formed by using the operational amplifier AR4 and the resistors R8-R11, the amplitude of the water environment monitoring signal is subtracted from the amplitude of the water environment monitoring signal, and if the obtained amplitude abnormal difference is larger than the amplitude of the water environment monitoring signal, and the operational amplifier AR5 outputs a high level; the frequency conversion circuit samples the water environment monitoring signal output by the water environment monitoring signal receiver, and a frequency sensor J1 with the model number of WBF122U01 is selected to convert the frequency of the water environment monitoring signal into a corresponding direct current voltage value in real time, when the frequency sensor J1 is just electrified, the output of the frequency sensor is increased from zero, meanwhile, a power supply +6V starts to charge a capacitor C6 through a resistor R24, at the moment, a relay K3 is not conducted, the direct current voltage value output by the frequency sensor J1 is connected with a contact 2 through a contact 1 of the relay K3 and falls to the ground through a current limiting resistor R23 until the charging voltage on the capacitor C6 reaches the conducting voltage of a control electrode of a controllable silicon Q10, the relay K3 is always conducted, and the direct current voltage value output by the frequency sensor J1 is continuously transmitted to an in-phase input end of an operational amplifier AR9 in the frequency monitoring circuit and a collector electrode of a triode Q8 through the contact 1 of the relay K3;
the frequency monitoring circuit uses the operational amplifier AR9-AR10 to compare the direct current voltage value corresponding to the water environment monitoring signal with the lower limit 1 of the standard voltage value and the upper limit 1 of the standard voltage value in sequence, when the operational amplifier AR9 outputs low level, the triode Q9 is conducted, the silicon controlled rectifier Q4 in the early warning circuit is controlled to be conducted at the moment, the power +3.3V is loaded to the base electrode of the triode Q3 through the silicon controlled rectifier Q4 and the current limiting resistor R13, so that the triode Q3 is conducted, if the operational amplifier AR5 outputs high level at this time, the triode Q2 is conducted, and the red light emitting diode D3 emits red light warning; when the operational amplifier AR9 outputs a high level, the operational amplifier AR7-AR8 is used for comparing a direct current voltage value corresponding to a water environment monitoring signal with a standard voltage value lower limit 2 and a standard voltage value upper limit 2 in sequence, when the operational amplifier AR7 outputs a low level, the triode Q6 is conducted, when the operational amplifier AR7 outputs a high level, the triode Q5 is conducted, when the operational amplifier AR8 outputs a high level, the triode Q7 is conducted, at the moment, a controllable silicon Q4 in an early warning circuit is controlled to be conducted, a power supply +3.3V is loaded to a base electrode of the triode Q3 through the controllable silicon Q4 and a current limiting resistor R13, so that the triode Q3 is conducted, and when the operational amplifier AR5 outputs the high level, the triode Q2 is also conducted, and the red light emitting diode D3 emits a red light warning;
if the direct current voltage value output by the frequency sensor J1 is larger than the lower limit 1 and the upper limit 1 of the standard voltage value and smaller than the lower limit 2 and the upper limit 2 of the standard voltage value, controlling a triode Q6 in the early warning circuit to be conducted, cutting off a triode Q5, charging a capacitor C5 by a power supply +6V through a resistor R18, and when the triode Q6 is cut off and the triode Q5 is conducted, stopping charging the capacitor C5 by the power supply +6V, conducting a relay K2, enabling a contact 1 to be connected with a contact 2, and rapidly discharging the capacitor C5 to the ground through a resistor R19; the charging voltage on the capacitor C5 is compared with the voltage value obtained by dividing the resistor R16-R17 in real time by using the operational amplifier AR6, when the charging voltage on the capacitor C5 is larger than the voltage value obtained by dividing the resistor R16-R17, the operational amplifier AR6 outputs a high level, the silicon controlled rectifier Q4 is conducted, the power +3.3V is loaded to the base electrode of the triode Q3 through the silicon controlled rectifier Q4 and the current limiting resistor R13, so that the triode Q3 is conducted, if the operational amplifier AR5 outputs a high level, the triode Q2 is also conducted, and the red light emitting diode D3 emits a red light warning.
While the invention has been described in connection with certain embodiments, it is not intended that the invention be limited thereto; for those skilled in the art to which the present invention pertains and the related art, on the premise of based on the technical scheme of the present invention, the expansion, the operation method and the data replacement should all fall within the protection scope of the present invention.
Claims (1)
1. The water environment monitoring device based on the Internet of things comprises detection equipment, a water environment monitoring signal modulation transmitter, a water environment monitoring signal receiver, a monitoring early warning module and a water environment monitoring center, and is characterized in that the detection equipment detects water quality indexes of a watershed water sample at regular time and quantity to obtain water sample index data, the water environment monitoring signal modulation transmitter carries out 2FSK modulation on the water sample index data to obtain a water environment monitoring signal and transmits the water environment monitoring signal to the water environment monitoring signal receiver, the monitoring early warning module samples the water environment monitoring signal received by the water environment monitoring signal receiver to carry out amplitude monitoring and frequency monitoring, and if the amplitude and the frequency of the water environment monitoring signal are severely distorted, a red light warning is sent to remind the water environment monitoring center of verifying the accuracy of the water environment monitoring signal, and the monitoring early warning module comprises an amplitude monitoring circuit, a frequency conversion circuit, a frequency monitoring circuit and a control early warning circuit;
the amplitude monitoring circuit samples the water environment monitoring signal output by the water environment monitoring signal receiver, the operational amplifier AR2 inverts the negative half cycle of the water environment monitoring signal, the capacitor C3 is charged by the water environment monitoring signal, the amplitude of the water environment monitoring signal is detected by the charging voltage of the capacitor C3, the operational amplifier AR4 is used for carrying out subtraction proportion operation on the amplitude of the water environment monitoring signal and the amplitude of the water environment monitoring signal, if the obtained amplitude abnormal difference value is larger than the amplitude of the water environment monitoring signal, the operational amplifier AR5 outputs a high level, the frequency conversion circuit samples the water environment monitoring signal output by the water environment monitoring signal receiver, the frequency sensor J1 with the model number of WBF122U01 is selected for converting the frequency of the water environment monitoring signal into a corresponding direct current voltage value in real time, and when the charging voltage on the capacitor C6 reaches the control electrode conducting voltage of the silicon controlled rectifier Q10, the frequency monitoring circuit uses the operational amplifier AR9-AR10 to compare the direct current voltage value corresponding to the water environment monitoring signal with the lower limit 1 and the upper limit 1 of the standard voltage value, the triode Q9 is conducted when the operational amplifier AR9 outputs low level, the direct current voltage value corresponding to the water environment monitoring signal is compared with the lower limit 2 and the upper limit 2 of the standard voltage value by using the operational amplifier AR7-AR8 when the operational amplifier AR9 outputs high level, the triode Q6 is conducted when the operational amplifier AR7 outputs low level, the triode Q5 is conducted when the operational amplifier AR8 outputs high level, the triode Q7 is conducted when the operational amplifier AR6 outputs high level, the control early warning circuit uses the voltage value obtained by dividing the voltage on the capacitor C5 and the resistors R16-R17 to compare, the triode Q3 is conducted when the output of the operational amplifier AR6 reaches the control electrode conducting voltage of the controllable silicon Q4, if the operational amplifier AR5 outputs a high level at this time, the triode Q2 is also turned on, and the red light emitting diode D3 emits a red light warning;
the amplitude monitoring circuit comprises an operational amplifier AR1, wherein the inverting input end of the operational amplifier AR1 is connected with an output port of a water environment monitoring signal receiver, a contact 3 of a relay K1 and an IN port of a frequency sensor J1 IN a frequency conversion circuit, the non-inverting input end of the operational amplifier AR1 is grounded and a contact 5 of the relay K1, the output end of the operational amplifier AR1 is connected with one end of an inductor L1, the other end of the inductor L1 is connected with one end of a resistor R1, the other end of the resistor R1 is connected with a contact 4 of the relay K1, a contact 2 of the relay K1 is connected with one end of the resistor R4, the other end of the resistor R4 is connected with one end of the resistor R3 and the inverting input end of the operational amplifier AR2, the other end of the resistor R2 is grounded, the output end of the operational amplifier AR2 is connected with the other end of the resistor R3, the contact 1 of the resistor K1, one end of the resistor R11, one end of the capacitor C1 and one end of the inductor L2, the other end of the capacitor C1 is connected with the resistor R5 and one end of the resistor R6, the other end of the resistor R5 is grounded, the other end of the inductor L2 and one end of the capacitor C2 are connected with the other end of the resistor R6 and the anode of the diode D1, the cathode of the diode D1 is connected with one end of the capacitor C3 and the non-inverting input end of the operational amplifier AR3, the other end of the capacitor C3 is grounded, the inverting input end of the operational amplifier AR3 is connected with the output end of the resistor R7, the other end of the resistor R7 is connected with one end of the resistor R8, one end of the resistor R9, the inverting input end of the operational amplifier AR4 and the inverting input end of the operational amplifier AR5, the other end of the resistor R9 is connected with the power supply +0.7V, the other end of the resistor R8 is connected with the output end of the operational amplifier 4 and the anode of the diode D2, the output end of the operational amplifier AR5 is connected with the control electrode of the controllable silicon Q1 IN a control circuit, the other end of the resistor R11 is connected with the non-inverting input end of the operational amplifier AR4 and one end of the resistor R10, the other end of the resistor R10 is grounded;
the frequency conversion circuit selects a frequency sensor J1 with the model number of WBF122U01, an IN port of the frequency sensor J1 is connected with an output port of a water environment monitoring signal receiver and an inverting input end of an operational amplifier AR1 IN an amplitude monitoring circuit, a contact 3 of a relay K1, a VCC port of the frequency sensor J1 is connected with a power supply +12V, a GND port of the frequency sensor J1 is grounded and one end of a voltage stabilizing diode D4 and one end of a capacitor C7, an OUT port of the frequency sensor J1 is connected with a cathode of the voltage stabilizing diode D4 and one end of an inductor L3, the other end of the inductor L3 is connected with the other end of the capacitor C7 and a contact 1 of a relay K3, a contact 2 of the relay K3 is connected with one end of a resistor R23, the other end of the resistor R23 is grounded, a contact 4 of the relay K3 is connected with a power supply +6V and one end of a resistor R24, the other end of the resistor R24 is connected with a control electrode of a silicon controlled Q10, the other end of the capacitor C6 is grounded and the cathode of the silicon controlled Q10, the other end of the capacitor C6 is connected with the other end of the silicon controlled Q10 and one end of the anode of the silicon controlled Q10 is connected with the other end of the same electrode, the other end of the resistor C3 is grounded, the other end of the resistor C3 is connected with the other end of the resistor C3 is grounded, the other end of the resistor 3 is connected with the other electrode 3 of the resistor 3 is connected with the amplifier 3, the amplifier 3 is connected with the amplifier 3;
the frequency monitoring circuit comprises an operational amplifier AR9, wherein the non-inverting input end of the operational amplifier AR9 is connected with the collector electrode of a triode Q8 and the contact 3 of a relay K3 of the frequency conversion circuit, the inverting input end of the operational amplifier AR9 is connected with the lower limit 1 of the standard voltage value, the output end of the operational amplifier AR9 is connected with one end of a resistor R22 and the non-inverting input end of an operational amplifier AR10, the other end of the resistor R22 is connected with the base electrode of the triode Q9, the emitter electrode of the triode Q9 is connected with the power supply +3.3V, the collector electrode of the triode Q9 is connected with the emitter electrode of a triode Q7 and one end of a resistor R15 in a control early warning circuit, the control electrode of a controllable silicon Q4, the inverting input end of the operational amplifier AR10 is connected with the upper limit 1 of the standard voltage value, the output end of the operational amplifier AR10 is connected with one end of a resistor R21, the other end of the resistor R21 is connected with the base electrode of a triode Q8, the emitter electrode of the triode Q8 is connected with the in-phase input end of an operational amplifier AR7, the reverse phase input end of the operational amplifier AR7 is connected with the lower limit 2 of a standard voltage value, the output end of the operational amplifier AR7 is connected with the in-phase input end of the operational amplifier AR8 and the base electrode of a triode Q6 and a triode Q5 in a control early warning circuit, the reverse phase input end of the operational amplifier AR8 is connected with the upper limit 2 of the standard voltage value, the output end of the operational amplifier AR8 is connected with one end of a resistor R20, the other end of the resistor R20 is connected with the base electrode of the triode Q7, and the collector electrode of the triode Q7 is connected with a power supply +3.3V;
the control early warning circuit comprises a triode Q5, the base electrode of the triode Q5 is connected with the base electrode of the triode Q6 and the in-phase input end of a resistor R19 and the other end of a capacitor C5, the contact 2 of the relay K2 is connected with the other end of the resistor R7, the other end of the resistor R15 is connected with the contact 1 of a relay K2 and the other end of a capacitor C5, the contact 4 of the relay K2 is grounded and the other end of the resistor R19 is connected with the other end of the capacitor C5, the reverse input end of the resistor R6 is connected with the other end of the resistor R16 and the resistor R17, the other end of the resistor R16 is connected with the contact 3V of a relay K2, the other end of the resistor R17 is grounded, the output end of the resistor R6 is connected with one end of the resistor R15, the other end of the resistor R15 is connected with the other end of the resistor R4, the other end of the resistor R3 is connected with the resistor R3, and the other end of the resistor R3 is connected with the resistor R3, the resistor Q2 is connected with the resistor Q3, the other end of the resistor Q2 is connected with the resistor C3, the resistor Q3, the other end of the resistor Q3 is connected with the resistor Q3, the other end is connected with the resistor R3, and the other end of the resistor Q3 is connected with the other end, the other end of the resistor is and the other end is connected with the resistor is and the other end, the other end is and the terminal is the terminal.
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