CN212989229U - Soil humidity measuring sensor - Google Patents
Soil humidity measuring sensor Download PDFInfo
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- CN212989229U CN212989229U CN202021205750.XU CN202021205750U CN212989229U CN 212989229 U CN212989229 U CN 212989229U CN 202021205750 U CN202021205750 U CN 202021205750U CN 212989229 U CN212989229 U CN 212989229U
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Abstract
Soil moisture measuring transducer belongs to soil moisture measurement field. The soil humidity measuring sensor comprises a pipe cap, a pipe body, a mounting pipe, a main control circuit board, an internal fixing copper ring mounting frame, a battery, a humidity measuring module and a pipe head; the main control circuit board is provided with a control circuit and a power supply circuit; the humidity measuring module is provided with an internal fixed copper ring mounting rack, an acquisition circuit board and a copper ring; the acquisition circuit board is provided with an acquisition circuit. Utilize advanced FDR frequency domain reflection principle, realize non-contact measurement soil moisture, effectively improve the life of sensor, keep the long-term precision of sensor stable, humidity measurement module can fix in a certain position, can realize stable continuation many soil layers and detect.
Description
Technical Field
The invention relates to a soil humidity measuring sensor, in particular to a soil humidity measuring sensor by using a frequency domain reflection method, belonging to the field of soil humidity measurement.
Background
Soil moisture measurement sensor can measure the water content of soil, is the good helper of smart type agricultural that becomes more meticulous, is the important component part of agricultural thing networking.
The traditional soil moisture measuring sensor based on TDR principle has many disadvantages, such as: the circuit is relatively complex and the equipment is relatively expensive; in contact measurement, after long-time use, the sensor electrode is oxidized, and the measurement result generates errors.
There is a need for a soil moisture measuring sensor that can measure without contact and has a high measurement accuracy.
The FDR frequency domain reflection is to measure the apparent dielectric constant of soil according to the transmission frequency of electromagnetic waves in a medium by utilizing the electromagnetic pulse principle so as to obtain the volume water content of the soil, and then the volume water content of the soil and the weight water content of the soil are obtained.
Disclosure of Invention
In view of the above-mentioned deficiencies, the present invention provides a soil moisture measuring sensor.
The invention is realized by the following technical scheme: the soil humidity measuring sensor comprises a pipe cap, a pipe body, a mounting pipe, a main control circuit board, an internal fixing copper ring mounting frame, a battery, a humidity measuring module and a pipe head;
the tube cap and the tube head are hermetically connected with the tube body, the mounting tube is connected with the tube cap, and the battery is fixedly connected with the mounting tube;
the main control circuit board is provided with a control circuit and a power supply circuit;
the tube cap is provided with a wiring port, a button and a light emitting diode, the main control circuit board, the battery, the humidity measuring module, the wiring port, the button and the light emitting diode are electrically connected with the battery, and the main control circuit board, the acquisition circuit board, the wiring port, the button and the light emitting diode are connected by data wires;
the humidity measuring module is provided with an internal fixed copper ring mounting rack, an acquisition circuit board and a copper ring;
the internal fixing copper ring mounting frame is provided with a main body plate, stand columns, mounting holes, copper ring supporting rods and copper ring stop blocks, the main body plate is connected with a plurality of stand columns, the main body plate is provided with the mounting holes, the main body plate is connected with four copper ring supporting rods, the copper ring stop blocks are connected to the side face of the main body plate and positioned between the two copper ring supporting rods on the same side, the top surfaces of the stand columns are provided with circuit board mounting holes, the copper ring supporting rods are provided with supporting rod stop faces, and the copper ring stop blocks are provided with stop block faces;
the collecting circuit board is arranged on the internal fixed copper ring mounting rack through a circuit board mounting hole formed on the top surface of the upright post on the internal fixed copper ring mounting rack;
the two copper rings are respectively arranged on the two opposite copper ring supporting rods;
the main control circuit board is arranged on the main control circuit board mounting frame through a circuit board mounting hole on the internal fixed copper ring mounting frame;
the acquisition circuit board is provided with an acquisition circuit;
the installation pipe on open and to have the fixed mounting hole, the fixed mounting hole that internal fixation copper ring mounting bracket passes through mounting hole and installation pipe links together, a plurality of humidity measurement module along installation pipe evenly distributed.
The power supply circuit comprises a power interface P1, a common mode inductor L1, a power module U1 for converting DC24V into DC12V, a power module U4 for converting DC12V into DC5V, a low dropout linear regulator U5, an active capacitor C5, a capacitor C7, an active capacitor C8, an active capacitor C12, a capacitor C13, an active capacitor C14, a capacitor C16 and a capacitor C17;
a power interface P1 is connected with a battery, a first pin and a second pin of a power interface P1 are respectively connected with a first pin and a second pin of a common-mode inductor L1, then a three-pin of the common-mode inductor L1 outputs 24V voltage and is connected with a two-pin of a DC 24V-DC 12V power module U1, and a four-pin of the common-mode inductor L1 is grounded;
one pin and seven pins of a power module U1 of a DC 24V-DC 12V are grounded, two pins are connected with three pins of a common-mode inductor L1, a polar capacitor C5 is connected with a capacitor C7 in parallel, the positive end of a polar capacitor C5 is connected with six pins of a power module U1 of the DC 24V-DC 12V, then the output of the terminal is 12V voltage, the terminal is connected with two pins of the power module U4 of the DC 12V-DC 5V-DC 5 power module, an eight pin of a power module U1 of the DC 24V-DC 12V-DC 12 power module is connected with the positive end of a polar capacitor C8, the other end of the polar capacitor C8 is connected with one end, which is not connected with the polar capacitor C5 and is connected with the polar capacitor C5 and the capacitor C7 in parallel, and then the two;
one pin and seven pins of a power module U4 of a DC 12V-DC 5V are grounded, the two pins are connected with two pins of a power module U1 of a DC 24-24V-DC 12V power, a polar capacitor C12 is connected with a capacitor C13 in parallel, the positive end of the polar capacitor C12 is connected with six pins of a power module U4 of a DC 12V-DC 5V power, then the positive end outputs 5V voltage and is connected with three pins of a low-dropout linear regulator U5 and an acquisition circuit, an eight pin of the power module U4 of the DC 12V-DC 5V power is connected with the positive end of the polar capacitor C14, the other end of the polar capacitor C14 is connected with one end, connected with a polar capacitor C12 and a capacitor C13 in parallel, of the positive pole of a non-polar capacitor C12, and then the two pins are grounded together;
the three pins of the low dropout linear regulator U5 are connected with the six pins of the DC 12V-DC 5V power supply module U4 and also connected with one end of a capacitor C17, the two and four pins of the low dropout linear regulator U5 and one end of a capacitor C16 are connected, then 3.3V voltage is output and connected with a control circuit, and one pin of the dropout linear regulator U5 is connected with the other end of the capacitor C17 and the other end of the capacitor C16 and then grounded together.
The control circuit comprises a single chip microcomputer U8, a resistor R3, a resistor R5, a resistor R7, a capacitor C26, a capacitor C31, a capacitor C35, a capacitor C37, a capacitor C45, a capacitor C51, a capacitor C55, a light-emitting diode LDE1, a crystal oscillator Y1 and a crystal oscillator Y2;
fifty, seventy-five, one hundred, twenty-eight, eleven and twenty-two pins of the singlechip U8 are connected with the end of the low dropout regulator U5 outputting 3.3V voltage, and are also connected with one end of a capacitor C55, and the other end of the capacitor C55 is grounded;
pins of a forty-nine, seventy-four, ninety-nine, twenty-seven, ten and nineteen of the singlechip U8 are all grounded;
the six pins of the singlechip U8 are connected with the end of the low dropout linear regulator U5, which outputs 3.3V voltage, and also connected with one end of a capacitor C51, and the other end of the capacitor C51 is grounded;
twenty-first pins of the single chip microcomputer U8 are connected with a 3.3V voltage output end of the low dropout linear regulator U5, twenty pins of the single chip microcomputer U8 are grounded, a fourteen pin of the single chip microcomputer U8 is connected with one end of a capacitor C45, the other end of the capacitor C45 is grounded, a ninety-four pin of the single chip microcomputer U8 is connected with one end of a resistor R7, and the other end of the resistor R7 is grounded;
a sixty-six pin of the singlechip U8 is connected with a negative electrode of a light-emitting diode LDE1, a positive electrode of a light-emitting diode LDE1 is connected with one end of a resistor R3, and the other end of the resistor R3 is connected with the end of the low dropout linear regulator U5, which outputs 3.3V voltage;
an eight-pin of the singlechip U8 is connected with one end of a crystal oscillator Y1 and one end of a capacitor C26, the other end of the capacitor C26 and one end of a capacitor C31 are also connected with the end of the crystal oscillator Y1, and then the eight-pin is grounded, and a nine-pin of the singlechip U8 is connected with the other end of the crystal oscillator Y1 and the other end of the capacitor C31;
the twelve pins of the singlechip U8 are connected with one end of a resistor R5, one end of a crystal oscillator Y2 and one end of a capacitor C35, the thirteen pins of the singlechip U8 are connected with the other end of a resistor R5, the other end of a crystal oscillator Y2 and one end of a capacitor C37, and the other end of the capacitor C35 and the other end of the capacitor C37 are grounded.
The number of the acquisition circuits is consistent with that of the humidity measurement modules, and the acquisition circuits comprise a voltage-controlled oscillator U5, a frequency division counter U6, an electrode capacitor C10, a capacitor C11, a capacitor C13, a capacitor C15, a capacitor C17, a capacitor C19, a capacitor C23, an electrode capacitor C24, a resistor R6, an inductor L2, a metal electrode B1 and a metal electrode B2;
one pin of the voltage-controlled oscillator U5 is connected with the output 5V voltage end of the DC 12V-DC 5V power supply module U4;
the anode of the polar capacitor C10 is connected with the output 5V voltage end of the DC 12V-DC 5V power supply module U4, and is connected with one pin of the voltage-controlled oscillator U5, and the other end of the voltage-controlled oscillator U5 is grounded;
one end of the capacitor C11 is connected with the output 5V voltage end of the DC 12V-DC 5V power supply module U4 and is connected with one pin of the voltage-controlled oscillator U5, and the other end is grounded;
one end of the capacitor C13 is connected with two pins of the voltage-controlled oscillator U5, and the other end of the capacitor C13 is grounded;
the capacitor C15 is connected with the inductor L2 in parallel, the two parallel ends of the capacitor C15 are respectively connected with the metal electrode B1 and the metal electrode B2, one end of the two parallel ends is connected with the three pins of the voltage-controlled oscillator U5, the other end of the two parallel ends is connected with one end of the capacitor C17 and is connected with the four pins of the voltage-controlled oscillator U5, and the other end of the capacitor C17 is grounded;
five pins and eight pins of the voltage-controlled oscillator U5 are grounded;
the six pins and the seven pins of the frequency division counter U6 are connected with each other, and then are connected with the six pins of the voltage-controlled oscillator U5, one end of a capacitor C19 and one end of a resistor R6, the other end of the capacitor C19 is connected with the nine pins of the frequency division counter U6, and the other end of the resistor R6 is connected with the four pins of the frequency division counter U6;
two pins, three pins and eight pins of the frequency division counter U6 are grounded, and five pins are connected with an output 5V voltage end of a DC 12V-DC 5V power supply module U4;
one end of the capacitor C23 is connected with the positive end of the active capacitor C24, then is connected with sixteen pins of the frequency division counter U6, and is connected with the output 5V voltage end of the DC 12-12V-DC 5V power module U4;
the ten-pin of the division counter U6 is connected to the control circuit.
The materials of the pipe cap, the pipe body, the mounting pipe, the main control circuit board mounting rack and the internal fixing copper ring mounting rack are wave-transparent materials, including but not limited to epoxy resin.
The invention has the advantages that the advanced FDR frequency domain reflection principle is utilized, the non-contact measurement of the soil humidity is realized, the service life of the sensor is effectively prolonged, and the long-term precision stability of the sensor is kept; the copper ring can be firmly fixed by the design of the internal fixing copper ring mounting frame, the copper ring cannot shake, and the detection precision and the detection result cannot be influenced; due to the arrangement of the upright posts and the circuit board mounting holes, the circuit board can be mounted in the copper ring, the internal space of the sensor is saved, circuit wiring can be reduced, and internal electric wiring is simple and clear; the arrangement of the blocking surface of the supporting rod and the blocking surface of the stop block limits the position of the copper ring, so that the copper ring is not easy to shake; the design of the acquisition circuit ensures the accuracy of the signal acquisition of the sensor, and data loss is avoided; the control circuit design ensures the rationality of the sensor processing signals and the accuracy of data; the setting of installation pipe makes humidity measurement module can fix in a certain position, can realize stable many soil layers of continuation and detect.
Drawings
FIG. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is an enlarged view taken at circle in FIG. 1;
FIG. 3 is a schematic view of the internal structure of the present invention in a lateral and lateral direction;
FIG. 4 is a side view of the internal structure of the present invention;
FIG. 5 is a front view of the present invention;
FIG. 6 is a schematic diagram of the internal structure of the present invention;
FIG. 7 is a schematic structural view of the internally fixed copper ring mounting bracket of the present invention;
FIG. 8 is a schematic structural diagram of a humidity measurement module according to the present invention;
FIG. 9 is a power supply circuit diagram of the present invention;
FIG. 10 is a control circuit diagram of the present invention;
fig. 11 is a diagram of an acquisition circuit of the present invention.
In the figure, 1, a pipe cap, 101, a wiring port, 102, a button, 103, a light emitting diode, 2, a pipe body, 3, an installation pipe, 4, a main control circuit board, 5, an internal fixation copper ring installation frame, 501, a main body board, 502, a column, 50201, a circuit board installation hole, 503, an installation hole, 504, a copper ring support rod, 50401, a support rod blocking surface, 505, a copper ring block, 50501, a block blocking surface, 6, a battery, 7, a humidity measurement module, 701, a collection circuit board, 702, a copper ring, 8 and a pipe head.
Detailed Description
The soil humidity measuring sensor comprises a pipe cap 1, a pipe body 2, a mounting pipe 3, a main control circuit board 4, a main control circuit board mounting frame 5, a battery 6, a humidity measuring module 7 and a pipe head 8;
the pipe cap 1 and the pipe head 8 are hermetically connected with the pipe body 2, the mounting pipe 3 is connected with the pipe cap 1, and the battery 6 is fixedly connected with the mounting pipe 3;
the main control circuit board 4 is provided with a control circuit and a power supply circuit;
the humidity measuring module 7 is provided with an internal fixed copper ring mounting rack 5, a collecting circuit board 701 and a copper ring 702;
the pipe cap 1 is provided with a wiring port 101, a button 102 and a light emitting diode 103, the main control circuit board 4, the battery 6, the humidity measuring module 7, the wiring port 101, the button 102 and the light emitting diode 103 are electrically connected with the battery 6, and the main control circuit board 4, the acquisition circuit board 701, the wiring port 101, the button 102 and the light emitting diode 103 are connected by data lines;
the internal fixing copper ring mounting rack 5 is provided with a main body plate 501, upright columns 502, mounting holes 503, copper ring supporting rods 504 and a copper ring stopper 505, the main body plate 501 is connected with a plurality of upright columns 502, the main body plate 501 is provided with the mounting holes 503, the main body plate 501 is connected with four copper ring supporting rods 504, the copper ring stopper 505 is connected to the side surface of the main body plate 501 and positioned in the middle of the two copper ring supporting rods 504 on the same side, the top surface of the upright column 502 is provided with a circuit board mounting hole 50201, the copper ring supporting rods 504 are provided with supporting rod blocking surfaces 50401, and the copper ring stopper 505 is provided with a stopper blocking surface 50501;
the main control circuit board 4 is mounted on the main control circuit board mounting rack 5 through a circuit board mounting hole 50201 on the internal fixed copper ring mounting rack 5;
the acquisition circuit board 701 is mounted on the internal fixed copper ring mounting rack 5 through a circuit board mounting hole 50201 formed in the top surface of the upright column 502 on the internal fixed copper ring mounting rack 5;
two copper rings 702 are respectively arranged on two copper ring supporting rods 504 which are opposite to each other on the internal fixed copper ring mounting rack 5;
the acquisition circuit board 701 is provided with an acquisition circuit;
the installation pipe 3 on open and to have the fixed mounting hole, the internal fixation copper ring mounting bracket 5 links together through the fixed mounting hole of mounting hole 503 with installation pipe 3, a plurality of humidity measurement module 7 along installation pipe 3 evenly distributed.
The power supply circuit comprises a power interface P1, a common mode inductor L1, a power module U1 for converting DC24V into DC12V, a power module U4 for converting DC12V into DC5V, a low dropout linear regulator U5, an active capacitor C5, a capacitor C7, an active capacitor C8, an active capacitor C12, a capacitor C13, an active capacitor C14, a capacitor C16 and a capacitor C17;
a power interface P1 is connected with a battery, a first pin and a second pin of a power interface P1 are respectively connected with a first pin and a second pin of a common-mode inductor L1, then a three-pin of the common-mode inductor L1 outputs 24V voltage and is connected with a two-pin of a DC 24V-DC 12V power module U1, and a four-pin of the common-mode inductor L1 is grounded;
one pin and seven pins of a power module U1 of a DC 24V-DC 12V are grounded, two pins are connected with three pins of a common-mode inductor L1, a polar capacitor C5 is connected with a capacitor C7 in parallel, the positive end of a polar capacitor C5 is connected with six pins of a power module U1 of the DC 24V-DC 12V, then the output of the terminal is 12V voltage, the terminal is connected with two pins of the power module U4 of the DC 12V-DC 5V-DC 5 power module, an eight pin of a power module U1 of the DC 24V-DC 12V-DC 12 power module is connected with the positive end of a polar capacitor C8, the other end of the polar capacitor C8 is connected with one end, which is not connected with the polar capacitor C5 and is connected with the polar capacitor C5 and the capacitor C7 in parallel, and then the two;
one pin and seven pins of a power module U4 of a DC 12V-DC 5V are grounded, the two pins are connected with two pins of a power module U1 of a DC 24-24V-DC 12V power, a polar capacitor C12 is connected with a capacitor C13 in parallel, the positive end of the polar capacitor C12 is connected with six pins of a power module U4 of a DC 12V-DC 5V power, then the positive end outputs 5V voltage and is connected with three pins of a low-dropout linear regulator U5 and an acquisition circuit, an eight pin of the power module U4 of the DC 12V-DC 5V power is connected with the positive end of the polar capacitor C14, the other end of the polar capacitor C14 is connected with one end, connected with a polar capacitor C12 and a capacitor C13 in parallel, of the positive pole of a non-polar capacitor C12, and then the two pins are grounded together;
the three pins of the low dropout linear regulator U5 are connected with the six pins of the DC 12V-DC 5V power supply module U4 and also connected with one end of a capacitor C17, the two and four pins of the low dropout linear regulator U5 and one end of a capacitor C16 are connected, then 3.3V voltage is output and connected with a control circuit, and one pin of the dropout linear regulator U5 is connected with the other end of the capacitor C17 and the other end of the capacitor C16 and then grounded together.
The control circuit comprises a single chip microcomputer U8, a resistor R3, a resistor R5, a resistor R7, a capacitor C26, a capacitor C31, a capacitor C35, a capacitor C37, a capacitor C45, a capacitor C51, a capacitor C55, a light-emitting diode LDE1, a crystal oscillator Y1 and a crystal oscillator Y2;
fifty, seventy-five, one hundred, twenty-eight, eleven and twenty-two pins of the singlechip U8 are connected with the end of the low dropout regulator U5 outputting 3.3V voltage, and are also connected with one end of a capacitor C55, and the other end of the capacitor C55 is grounded;
pins of a forty-nine, seventy-four, ninety-nine, twenty-seven, ten and nineteen of the singlechip U8 are all grounded;
the six pins of the singlechip U8 are connected with the end of the low dropout linear regulator U5, which outputs 3.3V voltage, and also connected with one end of a capacitor C51, and the other end of the capacitor C51 is grounded;
twenty-first pins of the single chip microcomputer U8 are connected with a 3.3V voltage output end of the low dropout linear regulator U5, twenty pins of the single chip microcomputer U8 are grounded, a fourteen pin of the single chip microcomputer U8 is connected with one end of a capacitor C45, the other end of the capacitor C45 is grounded, a ninety-four pin of the single chip microcomputer U8 is connected with one end of a resistor R7, and the other end of the resistor R7 is grounded;
a sixty-six pin of the singlechip U8 is connected with a negative electrode of a light-emitting diode LDE1, a positive electrode of a light-emitting diode LDE1 is connected with one end of a resistor R3, and the other end of the resistor R3 is connected with the end of the low dropout linear regulator U5, which outputs 3.3V voltage;
an eight-pin of the singlechip U8 is connected with one end of a crystal oscillator Y1 and one end of a capacitor C26, the other end of the capacitor C26 and one end of a capacitor C31 are also connected with the end of the crystal oscillator Y1, and then the eight-pin is grounded, and a nine-pin of the singlechip U8 is connected with the other end of the crystal oscillator Y1 and the other end of the capacitor C31;
the twelve pins of the singlechip U8 are connected with one end of a resistor R5, one end of a crystal oscillator Y2 and one end of a capacitor C35, the thirteen pins of the singlechip U8 are connected with the other end of a resistor R5, the other end of a crystal oscillator Y2 and one end of a capacitor C37, and the other end of the capacitor C35 and the other end of the capacitor C37 are grounded.
The number of the acquisition circuits is consistent with that of the humidity measurement modules, and the acquisition circuits comprise a voltage-controlled oscillator U5, a frequency division counter U6, an electrode capacitor C10, a capacitor C11, a capacitor C13, a capacitor C15, a capacitor C17, a capacitor C19, a capacitor C23, an electrode capacitor C24, a resistor R6, an inductor L2, a metal electrode B1 and a metal electrode B2;
a pin of the voltage-controlled oscillator U5 is connected with the anode of a 5V power supply;
the anode of the polar capacitor C10 is connected with the anode of a 5V power supply and is connected with one pin of a voltage-controlled oscillator U5, and the other end of the polar capacitor C10 is grounded;
one end of the capacitor C11 is connected with the anode of a 5V power supply and is connected with a pin of the voltage-controlled oscillator U5, and the other end of the capacitor C11 is grounded;
one end of the capacitor C13 is connected with two pins of the voltage-controlled oscillator U5, and the other end of the capacitor C13 is grounded;
the capacitor C15 is connected with the inductor L2 in parallel, the two parallel ends of the capacitor C15 are respectively connected with the metal electrode B1 and the metal electrode B2, one end of the two parallel ends is connected with the three pins of the voltage-controlled oscillator U5, the other end of the two parallel ends is connected with one end of the capacitor C17 and is connected with the four pins of the voltage-controlled oscillator U5, and the other end of the capacitor C17 is grounded;
five pins and eight pins of the voltage-controlled oscillator U5 are grounded;
the six pins and the seven pins of the frequency division counter U6 are connected with each other, and then are connected with the six pins of the voltage-controlled oscillator U5, one end of a capacitor C19 and one end of a resistor R6, the other end of the capacitor C19 is connected with the nine pins of the frequency division counter U6, and the other end of the resistor R6 is connected with the four pins of the frequency division counter U6;
two pins, three pins and eight pins of the frequency division counter U6 are grounded, and five pins are connected with the anode of a 5V power supply;
one end of a capacitor C23 is connected with the positive end of an active capacitor C24, then is connected with sixteen pins of a frequency division counter U6, and is connected with the positive electrode of a 5V power supply;
the ten-pin of the division counter U6 is connected to the control circuit.
The pipe cap 1, the pipe body 2, the mounting pipe 3 and the internal fixing copper ring mounting rack 5 are made of wave-transparent materials, including but not limited to epoxy resin.
The use method of the sensor comprises the following steps: firstly, drilling a hole at a selected position in a direction vertical to the ground by using a tool until the depth of the hole is flush with the installation position marked by the sensor, and ensuring that the sensor is smoothly put in and taken out; then, making slurry by using the excavated soil, finely rubbing the soil, removing impurities such as stones, grass roots and the like, adding water, and fully stirring to be viscous; then, pouring the slurry into the hole to the position of about 1/2 holes, slowly rotating the sensor and pressing down to enable the position of the installation marking line of the sensor to be flush with the hole opening; finally, in order to prevent the slurry from caking to influence the water infiltration, the redundant slurry around the sensor needs to be removed.
When the device is used, the whole device is ensured to vertically enter a hole dug in advance; avoid installing in low-lying place as far as possible, prevent that the rainwater from soaking the back and destroying waterproof construction, avoid the rainwater to flow backward into inside the device, arouse device short circuit or circuit trouble.
When the humidity measuring module of the sensor is assembled, the acquisition circuit board 701 is installed on the upright column 502 of the internal fixed copper ring installation rack 5 through the circuit board installation hole 50201, then the copper ring 702 is installed, after the installation, the position of the copper ring 702 is adjusted, the copper ring support rod 504 is ensured to be supported in the diameter direction of the copper ring 702, the upper top surface of the copper ring 702 is ensured to be attached to the support rod blocking surface 50401, or the lower top surface of the copper ring 702 is attached to the blocking block blocking surface 50501, and then the distance between two adjacent top surfaces of the two copper rings 702 is measured and calculated, so that the distance between the two copper rings 702 meets the requirement.
The acquisition circuit of the humidity measurement module of the sensor is powered by the power supply circuit, and acquired data are transmitted to the control circuit through frequency division and are processed by the control circuit.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
It will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in the embodiments described above without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims.
Claims (5)
1. The soil humidity measuring sensor is characterized by comprising a pipe cap, a pipe body, a mounting pipe, a main control circuit board, an internal fixing copper ring mounting frame, a battery, a humidity measuring module and a pipe head;
the tube cap and the tube head are hermetically connected with the tube body, the mounting tube is connected with the tube cap, and the battery is fixedly connected with the mounting tube;
the main control circuit board is provided with a control circuit and a power supply circuit;
the tube cap is provided with a wiring port, a button and a light emitting diode, the main control circuit board, the battery, the humidity measuring module, the wiring port, the button and the light emitting diode are electrically connected with the battery, and the main control circuit board, the acquisition circuit board, the wiring port, the button and the light emitting diode are connected by data wires;
the humidity measuring module is provided with an internal fixed copper ring mounting rack, an acquisition circuit board and a copper ring;
the internal fixing copper ring mounting frame is provided with a main body plate, stand columns, mounting holes, copper ring supporting rods and copper ring stop blocks, the main body plate is connected with a plurality of stand columns, the main body plate is provided with the mounting holes, the main body plate is connected with four copper ring supporting rods, the copper ring stop blocks are connected to the side face of the main body plate and positioned between the two copper ring supporting rods on the same side, the top surfaces of the stand columns are provided with circuit board mounting holes, the copper ring supporting rods are provided with supporting rod stop faces, and the copper ring stop blocks are provided with stop block faces;
the collecting circuit board is arranged on the internal fixed copper ring mounting rack through a circuit board mounting hole formed on the top surface of the upright post on the internal fixed copper ring mounting rack;
the two copper rings are respectively arranged on the two opposite copper ring supporting rods;
the main control circuit board is arranged on the main control circuit board mounting frame through a circuit board mounting hole on the internal fixed copper ring mounting frame;
the acquisition circuit board is provided with an acquisition circuit;
the installation pipe on open and to have the fixed mounting hole, the fixed mounting hole that internal fixation copper ring mounting bracket passes through mounting hole and installation pipe links together, a plurality of humidity measurement module along installation pipe evenly distributed.
2. The soil moisture measuring sensor of claim 1, wherein said power supply circuit comprises a power interface P1, a common mode inductor L1, a power module U1 from DC24V to DC12V, a power module U4 from DC12V to DC5V, a low dropout linear regulator U5, a polar capacitor C5, a capacitor C7, a polar capacitor C8, a polar capacitor C12, a capacitor C13, a polar capacitor C14, a capacitor C16, and a capacitor C17;
a power interface P1 is connected with a battery, a first pin and a second pin of a power interface P1 are respectively connected with a first pin and a second pin of a common-mode inductor L1, then a three-pin of the common-mode inductor L1 outputs 24V voltage and is connected with a two-pin of a DC 24V-DC 12V power module U1, and a four-pin of the common-mode inductor L1 is grounded;
one pin and seven pins of a power module U1 of a DC 24V-DC 12V are grounded, two pins are connected with three pins of a common-mode inductor L1, a polar capacitor C5 is connected with a capacitor C7 in parallel, the positive end of a polar capacitor C5 is connected with six pins of a power module U1 of the DC 24V-DC 12V, then the terminal outputs 12V voltage and is connected with two pins of the power module U4 of the DC 12V-DC 5V, eight pins of a power module U1 of the DC 24V-DC 12V are connected with the positive end of a polar capacitor C8, the other end of the polar capacitor C8 is connected with one end, which is not connected with the positive electrode of the polar capacitor C5, of the polar capacitor C5 and the capacitor C7 in parallel, and then the two pins are grounded together; one pin and seven pins of a power module U4 of a DC 12V-DC 5V are grounded, the two pins are connected with two pins of a power module U1 of a DC 24-24V-DC 12V power, a polar capacitor C12 is connected with a capacitor C13 in parallel, the positive end of the polar capacitor C12 is connected with six pins of a power module U4 of a DC 12V-DC 5V power, then the positive end outputs 5V voltage and is connected with three pins of a low-voltage-difference linear voltage regulator U5 and an acquisition circuit, an eight pin of the power module U4 of the DC 12V-DC 5V power is connected with the positive end of a polar capacitor C14, the other end of the polar capacitor C14 is connected with one end, connected with a polar capacitor C12 and a capacitor C13 in parallel, of the other end is not connected with the positive end of the polar capacitor C12, and;
the three pins of the low dropout linear regulator U5 are connected with the six pins of the DC 12V-DC 5V power supply module U4 and also connected with one end of a capacitor C17, the two and four pins of the low dropout linear regulator U5 and one end of a capacitor C16 are connected, then 3.3V voltage is output and connected with a control circuit, and one pin of the dropout linear regulator U5 is connected with the other end of the capacitor C17 and the other end of the capacitor C16 and then grounded together.
3. The soil moisture measuring sensor of claim 2, wherein the control circuit comprises a single chip microcomputer U8, a resistor R3, a resistor R5, a resistor R7, a capacitor C26, a capacitor C31, a capacitor C35, a capacitor C37, a capacitor C45, a capacitor C51, a capacitor C55, a light emitting diode LDE1, a crystal oscillator Y1 and a crystal oscillator Y2;
fifty, seventy-five, one hundred, twenty-eight, eleven and twenty-two pins of the singlechip U8 are connected with the end of the low dropout regulator U5 outputting 3.3V voltage, and are also connected with one end of a capacitor C55, and the other end of the capacitor C55 is grounded;
pins of a forty-nine, seventy-four, ninety-nine, twenty-seven, ten and nineteen of the singlechip U8 are all grounded;
the six pins of the singlechip U8 are connected with the end of the low dropout linear regulator U5, which outputs 3.3V voltage, and also connected with one end of a capacitor C51, and the other end of the capacitor C51 is grounded;
twenty-first pins of the singlechip U8 are connected with the end of the low dropout linear regulator U5, which outputs 3.3V voltage, twenty pins of the singlechip U8 are grounded, fourteen pins of the singlechip U8 are connected with one end of a capacitor C45, the other end of the capacitor C45 is grounded, ninety-four pins of the singlechip U8 are connected with one end of a resistor R7, and the other end of the resistor R7 is grounded;
a sixty-six pin of the singlechip U8 is connected with a negative electrode of a light-emitting diode LDE1, a positive electrode of a light-emitting diode LDE1 is connected with one end of a resistor R3, and the other end of the resistor R3 is connected with the end of the low dropout linear regulator U5, which outputs 3.3V voltage;
an eight-pin of the singlechip U8 is connected with one end of a crystal oscillator Y1 and one end of a capacitor C26, the other end of the capacitor C26 and one end of a capacitor C31 are also connected with the end of the crystal oscillator Y1, and then the eight-pin is grounded, and a nine-pin of the singlechip U8 is connected with the other end of the crystal oscillator Y1 and the other end of the capacitor C31;
the twelve pins of the singlechip U8 are connected with one end of a resistor R5, one end of a crystal oscillator Y2 and one end of a capacitor C35, the thirteen pins of the singlechip U8 are connected with the other end of a resistor R5, the other end of a crystal oscillator Y2 and one end of a capacitor C37, and the other end of the capacitor C35 and the other end of the capacitor C37 are grounded.
4. The soil humidity measurement sensor according to claim 3, wherein the number of the acquisition circuits is the same as that of the humidity measurement modules, and the acquisition circuits comprise a voltage-controlled oscillator U5, a frequency division counter U6, an active capacitor C10, a capacitor C11, a capacitor C13, a capacitor C15, a capacitor C17, a capacitor C19, a capacitor C23, an active capacitor C24, a resistor R6, an inductor L2, a metal electrode B1 and a metal electrode B2;
one pin of the voltage-controlled oscillator U5 is connected with the output 5V voltage end of the DC 12V-DC 5V power supply module U4;
the anode of the polar capacitor C10 is connected with the output 5V voltage end of the DC 12V-DC 5V power supply module U4, and is connected with one pin of the voltage-controlled oscillator U5, and the other end of the voltage-controlled oscillator U5 is grounded;
one end of the capacitor C11 is connected with the output 5V voltage end of the DC 12V-DC 5V power supply module U4 and is connected with one pin of the voltage-controlled oscillator U5, and the other end is grounded;
one end of the capacitor C13 is connected with two pins of the voltage-controlled oscillator U5, and the other end of the capacitor C13 is grounded;
the capacitor C15 is connected with the inductor L2 in parallel, the two parallel ends of the capacitor C15 are respectively connected with the metal electrode B1 and the metal electrode B2, one end of the two parallel ends is connected with the three pins of the voltage-controlled oscillator U5, the other end of the two parallel ends is connected with one end of the capacitor C17 and is connected with the four pins of the voltage-controlled oscillator U5, and the other end of the capacitor C17 is grounded;
five pins and eight pins of the voltage-controlled oscillator U5 are grounded;
the six pins and the seven pins of the frequency division counter U6 are connected with each other, and then are connected with the six pins of the voltage-controlled oscillator U5, one end of a capacitor C19 and one end of a resistor R6, the other end of the capacitor C19 is connected with the nine pins of the frequency division counter U6, and the other end of the resistor R6 is connected with the four pins of the frequency division counter U6;
two pins, three pins and eight pins of the frequency division counter U6 are grounded, and five pins are connected with an output 5V voltage end of a DC 12V-DC 5V power supply module U4;
one end of the capacitor C23 is connected with the positive end of the active capacitor C24, then is connected with sixteen pins of the frequency division counter U6, and is connected with the output 5V voltage end of the DC 12-12V-DC 5V power module U4;
the ten-pin of the division counter U6 is connected to the control circuit.
5. The soil moisture sensor of claim 4, wherein the cap, tube, mounting tube, main control circuit board mounting bracket and internal fixing copper ring mounting bracket are made of wave-transparent material, including but not limited to epoxy resin.
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|---|---|---|---|
| CN202021205750.XU CN212989229U (en) | 2020-06-28 | 2020-06-28 | Soil humidity measuring sensor |
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| CN202021205750.XU CN212989229U (en) | 2020-06-28 | 2020-06-28 | Soil humidity measuring sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2924949A1 (en) * | 2021-10-07 | 2022-10-11 | Univ Valladolid | SYSTEM TO MEASURE HUMIDITY IN A MEDIUM (Machine-translation by Google Translate, not legally binding) |
| WO2023158414A1 (en) * | 2022-02-16 | 2023-08-24 | Yonca Teknoloji Muhendislik Ve Elektronik Hiz. Ltd. Sti. | A sensor device for sensing humidity rate in the soil |
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2020
- 2020-06-28 CN CN202021205750.XU patent/CN212989229U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2924949A1 (en) * | 2021-10-07 | 2022-10-11 | Univ Valladolid | SYSTEM TO MEASURE HUMIDITY IN A MEDIUM (Machine-translation by Google Translate, not legally binding) |
| WO2023158414A1 (en) * | 2022-02-16 | 2023-08-24 | Yonca Teknoloji Muhendislik Ve Elektronik Hiz. Ltd. Sti. | A sensor device for sensing humidity rate in the soil |
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