CN117309816A - Quick identification system of soil non-excavation type navigator - Google Patents
Quick identification system of soil non-excavation type navigator Download PDFInfo
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- CN117309816A CN117309816A CN202311382926.7A CN202311382926A CN117309816A CN 117309816 A CN117309816 A CN 117309816A CN 202311382926 A CN202311382926 A CN 202311382926A CN 117309816 A CN117309816 A CN 117309816A
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- 239000002689 soil Substances 0.000 title claims abstract description 38
- 238000009412 basement excavation Methods 0.000 title claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 88
- 238000005070 sampling Methods 0.000 claims abstract description 36
- 229910052751 metal Inorganic materials 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 19
- 238000007600 charging Methods 0.000 claims description 87
- 238000006243 chemical reaction Methods 0.000 claims description 35
- 230000002457 bidirectional effect Effects 0.000 claims description 21
- 230000000903 blocking effect Effects 0.000 claims description 20
- 238000002955 isolation Methods 0.000 claims description 19
- 230000000087 stabilizing effect Effects 0.000 claims description 18
- 238000004891 communication Methods 0.000 claims description 13
- 230000003993 interaction Effects 0.000 claims description 8
- 230000003321 amplification Effects 0.000 claims 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 6
- 239000000523 sample Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004856 soil analysis Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
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- Life Sciences & Earth Sciences (AREA)
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measurement Of Current Or Voltage (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the field of soil detection equipment, and provides a rapid identification system of a soil non-excavation navigator, which comprises a main control module, a power supply module, a temperature detection circuit and a metal content detection module, wherein the metal content detection module comprises a light source driving circuit, a digital micromirror controller, a photoelectric detector and a sampling circuit, the input end of the light source driving circuit is connected with the power supply module, the controlled end is connected with the main control module, the output end is connected with a light source so as to regulate the output current of the light source, the input end of the photoelectric detector is connected with the digital micromirror controller, the input end of the sampling circuit is connected with the output end of the photoelectric detector, the output end of the sampling circuit is connected with the main control module, and the temperature detection circuit is connected with the main control module and is used for transmitting the internal temperature information of an instrument to the main control module; the invention has high detection precision when detecting the metal content in the soil, and can compensate according to the temperature.
Description
Technical Field
The invention relates to the field of soil detection equipment, in particular to a rapid identification system of a soil non-excavation navigator.
Background
The soil detection is to detect and identify the contents of heavy metals, nitrogen, phosphorus and potassium elements in the soil, as the reflection conditions of different substances in the soil on the light source are inconsistent, the contents of various substances in the soil can be judged by emitting light with different wavelengths and detecting different reflected lights by the light receiver.
Disclosure of Invention
The invention solves the problem of how to provide a rapid identification system of a soil non-excavation navigator, which has high detection precision and can compensate according to temperature.
In order to solve the above problems, the present invention provides a rapid identification system of a soil non-excavation navigator, comprising: the temperature detection circuit comprises a main control module, a power supply module, a temperature detection circuit and a metal content detection module, wherein the metal content detection module comprises a light source driving circuit, a digital micro-mirror controller, a photoelectric detector and a sampling circuit, the input end of the light source driving circuit is connected with the power supply module, the controlled end of the light source driving circuit is connected with the main control module, the output end of the light source driving circuit is connected with the light source so as to adjust the output current of the light source, the input end of the photoelectric detector is connected with the digital micro-mirror controller so as to convert a reflected light signal received by the digital micro-mirror controller into an electric signal, the input end of the sampling circuit is connected with the output end of the photoelectric detector, the output end of the sampling circuit is connected with the main control module so as to transmit the electric signal to the main control module, and the temperature detection circuit is connected with the main control module so as to transmit the internal temperature information of an instrument to the main control module.
Further, the light source driving circuit comprises a voltage stabilizing circuit and an output current control circuit, wherein the input end of the voltage stabilizing circuit is connected with the power supply module, the output end of the voltage stabilizing circuit is connected with the input end of the output current control circuit, the controlled end of the output current control circuit is connected with the main control module, and the output end of the output current control circuit is connected with the light source.
Further, the voltage stabilizing circuit comprises a first power supply conversion chip and a switching value isolation circuit, wherein the input end of the switching value isolation circuit is connected with the main control module, the output end of the switching value isolation circuit is connected with the enabling end of the first power supply conversion chip, the input end of the first power supply conversion chip is connected with the power supply module, and the output end of the first power supply conversion chip is connected with the output current control circuit; the output current control circuit comprises a first current output chip, a power supply filter circuit, a first amplifying circuit and a current sampling circuit, wherein the current sampling circuit comprises a first sampling resistor and a first current sensing amplifier, a first input end of the first amplifying circuit is connected with an output end of the voltage stabilizing circuit through the power supply filter circuit, an input end of the first amplifying circuit is connected with the main control module, an output end of the first amplifying circuit is connected with a controlled end of the first current output chip, the first sampling resistor is arranged between the light source and the ground, two input ends of the first current sensing amplifier are respectively connected with two ends of the first sampling resistor, and an output end of the first current sensing amplifier is connected with a second input end of the first current output chip so as to realize accurate control of light source current.
Further, the sampling circuit comprises a second amplifying circuit, a third amplifying circuit and a first digital-to-analog conversion circuit, wherein two output ends of the photoelectric detector are respectively connected with the input end of the first digital-to-analog conversion circuit through the second amplifying circuit and the third amplifying circuit, and the output end of the first digital-to-analog conversion circuit is connected with the main control module.
Further, the power supply module comprises a power supply conversion circuit and a charging circuit, wherein the input end of the power supply conversion circuit is connected with the battery, the output end of the power supply conversion circuit is respectively connected with the main control module and the metal content detection module, the input end of the charging circuit is suitable for being connected with an external power supply, and the output end of the charging circuit is connected with the battery.
Further, the charging circuit comprises a power input interface, a charging management chip, a charging control circuit, a bidirectional blocking circuit, a power supply path selection circuit, an input voltage detection circuit, an input current detection circuit, a charging current detection circuit and a battery voltage detection circuit, wherein the input end of the bidirectional blocking circuit is connected with the power input interface, the output end of the bidirectional blocking circuit is connected with the charging control circuit, the controlled end of the charging control circuit is connected with the charging management chip, the output end of the charging control circuit is connected with the battery so as to realize the control of the charging current of the battery, the input end of the input voltage detection circuit is connected with the power input interface, the output end of the input current detection circuit is connected with the input end of the charging control circuit, the output end of the charging current detection circuit is connected with the output end of the charging control circuit, the output end of the charging current detection circuit is connected with the charging management chip, the input end of the battery voltage detection circuit is connected with the battery, the output end of the charging management chip is connected with the charging management chip, the main control chip is connected with the power supply path selection circuit, and the input end of the charging management chip is connected with the second input end of the power supply path.
Further, the bidirectional blocking circuit comprises a first MOS tube and a second MOS tube, wherein grid electrodes of the first MOS tube and the second MOS tube are connected with the output end of the charging management chip, a drain electrode of the first MOS tube is connected with the power input interface, a source electrode of the first MOS tube is connected with a source electrode of the second MOS tube, and a drain electrode of the second MOS tube is connected with the charging control circuit; the power supply path selection circuit comprises a first diode and a second diode, wherein the anode of the first diode is connected with the power input interface, the anode of the second diode is connected with the battery, and the cathode of the first diode and the cathode of the second diode are connected with the power end of the charge management chip.
Further, the charging control circuit comprises a third MOS tube, a fourth MOS tube and a first inductor, wherein grid electrodes of the third MOS tube and the fourth MOS tube are respectively connected with one PWM signal end of the charging management chip, a drain electrode of the third MOS tube is connected with an output end of the bidirectional blocking circuit, a source electrode of the third MOS tube is connected with a first end of the first inductor, a drain electrode of the fourth MOS tube is connected with the first end of the first inductor, the source electrode of the fourth MOS tube is grounded, and an output end of the first inductor is connected with the battery.
Further, the quick identification system of the soil non-excavation navigator further comprises a communication module, a man-machine interaction module and a PH value detection module, wherein the communication module is connected with the main control module and used for communication between the main control module and the cloud platform, the man-machine interaction module is connected with the main control module and used for operation of a user, and the PH value detection module is connected with the main control module and used for transmitting detected PH value information of soil to the main control module.
Further, the PH value detection module comprises a PH value acquisition circuit, a two-stage amplifying circuit, a photoelectric isolation circuit and a follower circuit, wherein the input end of the PH value acquisition circuit is connected with a PH sensor, the output end of the PH value acquisition circuit is connected with the input end of the two-stage amplifying circuit, the output end of the two-stage amplifying circuit is connected with the input end of the photoelectric isolation circuit, the output end of the photoelectric isolation circuit is connected with the input end of the follower circuit, and the output end of the follower circuit is connected with the main control module.
Compared with the prior art, the invention has the beneficial effects that:
the power supply module provides power for the main control module and the metal content detection module, the light source driving circuit is controlled by the main control module, and then the light source is driven, and the current flowing through the light source is regulated, the intensity of emitted light is controlled, the light reflection conditions of different intensities are collected and are subjected to contrast analysis, soil information is accurately obtained, the digital micromirror controller, namely the DMD device, is used for collecting emitted light signals and carrying out digital light modulation, the modulated light enters the photoelectric detector, the photoelectric detector receives and photoelectrically converts the modulated light signals, the converted electrical signals are processed by the sampling circuit and then are transmitted to the main control module, the main control module analyzes to obtain the metal content of the soil, meanwhile, the temperature sensor transmits the internal temperature information of the instrument to the main control module, and the main control module accordingly regulates the driving current of the light source driving circuit, so that temperature compensation is realized, and the accuracy of light signal reflection detection is ensured.
Drawings
FIG. 1 is a schematic diagram of a metal content detection module according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a schematic structure of a light source driving circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a sampling circuit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a charging circuit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the overall principle of the embodiment of the present invention;
fig. 6 is a schematic structural diagram of a PH detection module according to an embodiment of the invention.
Reference numerals illustrate:
1-a main control module; 2-a power module; 21-a power input interface; 22-a charge management chip; 23-a charge control circuit; 24-a bidirectional blocking circuit; 25-a power supply path selection circuit; 26-an input voltage detection circuit; 27-an input current detection circuit; 28-a charging current detection circuit; 29-a battery voltage detection circuit; 3-a temperature detection circuit; 4-a metal content detection module; 41-a light source driving circuit; 411-voltage stabilizing circuit; 412-an output current control circuit; 42-a digital micromirror controller; 43-a photodetector; a 44-sampling circuit; 441-a second amplifying circuit; 442-a third amplifying circuit; 443-a first digital to analog conversion circuit; 5-a communication module; 6-a man-machine interaction module; 7-PH value detection module; 71-PH value acquisition circuit; 72-a two-stage amplifying circuit; 73-a photo-isolation circuit; 74-follower circuit.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present specification, the descriptions of the terms "embodiment," "one embodiment," and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or embodiment is included in at least one embodiment or illustrated embodiment of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same examples or implementations. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or implementations.
As shown in fig. 1, the present invention provides a rapid identification system of a soil non-excavation navigator, comprising: the temperature detection device comprises a main control module 1, a power supply module 2, a temperature detection circuit 3 and a metal content detection module 4, wherein the metal content detection module 4 comprises a light source driving circuit 41, a digital micro-mirror controller 42, a photoelectric detector 43 and a sampling circuit 44, the input end of the light source driving circuit 41 is connected with the power supply module 2, the controlled end of the light source driving circuit is connected with the main control module 1, the output end of the light source driving circuit is connected with the light source so as to adjust the output current of the light source, the input end of the photoelectric detector 43 is connected with the digital micro-mirror controller 42 so as to convert the reflected light signals received by the digital micro-mirror controller 42 into electric signals, the input end of the sampling circuit 44 is connected with the output end of the photoelectric detector 43, the output end of the sampling circuit is connected with the main control module 1 so as to transmit the electric signals to the main control module 1, and the temperature detection circuit 3 is connected with the main control module 1 so as to transmit the internal temperature information of an instrument to the main control module 1.
It should be noted that, when in use, the power module 2 provides power for the main control module 1 and the metal content detection module 4, the light source driving circuit 41 is controlled by the main control module 1 to further drive the light source, regulate the current flowing through the light source, control the intensity of the emitted light, collect the reflection conditions of the light rays with different intensities for comparative analysis, accurately obtain soil information, the digital micromirror controller 42, i.e. the DMD device, is used for collecting the emitted light signals, the DMD device is internally provided with a plurality of micromirrors, when the light rays reflected by the soil to be detected are reflected to the surface of the DMD device through the grating, the DMD device carries out digital light modulation on the reflected light rays through the internal micromirrors, the modulated light enters the photodetector 43, the digital micromirror controller 42 can adopt the DMD device with the model of DLP2010NIR, the photodetector 43 receives and photoelectrically converts the modulated light signals, the converted electric signal is processed by the sampling circuit 44 and then transmitted to the main control module 1, the main control module 1 analyzes the electric signal to obtain the metal component content of the soil, the temperature sensor is arranged at a light source in the soil analysis instrument loading the system, the light source in the instrument works to cause the temperature in the instrument to rise in high temperature weather, at this time, the temperature sensor transmits the temperature information in the instrument to the main control module 1, the main control module 1 carries out temperature compensation according to the temperature information, the light source driving circuit 41 can send a control signal to adjust the magnitude of the driving current, for example, the driving current of the light source can be reduced when the temperature is too high, thereby ensuring the accuracy of the reflection detection of the light signal, in the embodiment, the light source can adopt an LED light source, the light source can have multiple paths according to the requirement and the light source driving circuit 41, the main control module 1 can adopt a control chip with the model of TM4C1297NCZADI 3.
In one embodiment of the present invention, the light source driving circuit 41 includes a voltage stabilizing circuit 411 and an output current control circuit 412, wherein an input end of the voltage stabilizing circuit 411 is connected to the power module 2, an output end of the voltage stabilizing circuit is connected to an input end of the output current control circuit 412, a controlled end of the output current control circuit 412 is connected to the main control module 1, and an output end of the output current control circuit is connected to the light source.
It should be noted that, as shown in fig. 2, the output current control circuit 412 may control the current to the light source, so as to change the intensity of the light source, the voltage stabilizing circuit 411 is used to provide a stable working voltage for the output current control circuit 412, so as to ensure the stability of the control of the current to the light source, the switch of the voltage stabilizing circuit 411 is controlled by the main control module 1, when the detection of the light source is not needed, the main control module 1 can close the voltage stabilizing circuit 411 in time, and cut off the power supply to the light source driving circuit 41, so as to reduce the standby energy consumption.
In one embodiment of the present invention, the voltage stabilizing circuit 411 includes a first power conversion chip and a switching value isolation circuit, wherein an input end of the switching value isolation circuit is connected to the main control module 1, an output end of the switching value isolation circuit is connected to an enable end of the first power conversion chip, an input end of the first power conversion chip is connected to the power module 2, and an output end of the first power conversion chip is connected to the output current control circuit 412; the output current control circuit 412 includes a first current output chip, a power supply filter circuit, a first amplifying circuit and a current sampling circuit 44, the current sampling circuit 44 includes a first sampling resistor and a first current sensing amplifier, a first input end of the first amplifying circuit is connected with an output end of the voltage stabilizing circuit 411 through the power supply filter circuit, an input end of the first amplifying circuit is connected with the main control module 1, an output end is connected with a controlled end of the first current output chip, the first sampling resistor is arranged between the light source and the ground, two input ends of the first current sensing amplifier are respectively connected with two ends of the first sampling resistor, and an output end is connected with a second input end of the first current output chip to realize accurate control of the light source current.
It should be noted that, as shown in fig. 2, the chip U31 is a first power conversion chip, after the switching value signal sent by the main control module 1 is isolated, the switching value signal is output to the enable end EN of the chip U31, so as to control the switch of the chip U31, so as to reduce the energy consumption to be stored, and the type of the chip U31 can adopt TPS81256SIP; in the output current control circuit 412, the inductor L5 and the capacitors C96 and C97 form a power supply filter circuit, the chip U32 is a first current output chip, the voltage after voltage stabilization enters the first input end of the chip U32 through the power supply filter circuit, the 10 pin of the chip U32 is a controlled end, the main control module 1 sends out a signal to the 10 pin of the chip U32 to change the current output of the output end of the chip U32, namely, the current output of the light source is changed, the chip U33 is a first current sense amplifier, the resistor R55 is a first sampling resistor, the chip U33 can obtain the current value flowing through the light source through the voltage at two ends of the resistor R55 and convert the current value into a voltage signal to be output to the second input end of the chip U32, so that the current of the light source can be controlled more accurately through detection feedback of the current, the type of the chip U32 can be OPA567AIRHG, and the type of the chip U33 can be INA213BIDCkt.
In one embodiment of the present invention, the sampling circuit 44 includes a second amplifying circuit 441, a third amplifying circuit 442 and a first digital-to-analog conversion circuit 443, two output ends of the photodetector 43 are respectively connected to an input end of the first digital-to-analog conversion circuit 443 via the second amplifying circuit 441 and the third amplifying circuit 442, and an output end of the first digital-to-analog conversion circuit 443 is connected to the main control module 1.
It should be noted that, as shown in fig. 3, the amplified signal output by the photodetector 43 enters the first digital-to-analog conversion circuit 443, the signal passes through the operational amplifier circuit and has the characteristics of high precision, low noise, low power consumption and high gain bandwidth, the signal can be restored to the original signal to the greatest extent after being sampled by the first digital-to-analog conversion circuit 443, the scanning precision is ensured, the interface J8 is an interface connected with the main control module 1, and the output signal of the temperature detection circuit 3 is also transmitted to the main control module 1 through the interface J8.
In one embodiment of the present invention, the power module 2 includes a power supply conversion circuit and a charging circuit, wherein an input end of the power supply conversion circuit is connected with a battery, an output end of the power supply conversion circuit is respectively connected with the main control module 1 and the metal content detection module 4, an input end of the charging circuit is suitable for being connected with an external power supply, and an output end of the charging circuit is connected with the battery.
It should be noted that, this system adopts the lithium cell as the power, can satisfy the demand of open-air soil detection, and power supply conversion circuit is used for after battery voltage conversion, for main control module 1 and metal content detection module 4 supply power, and charging circuit is used for carrying out accurate control to the charging of battery.
In one embodiment of the present invention, the charging circuit includes a power input interface 21, a charging management chip 22, a charging control circuit 23, a bidirectional blocking circuit 24, a power supply path selection circuit 25, an input voltage detection circuit 26, an input current detection circuit 27, a charging current detection circuit 28, and a battery voltage detection circuit 29, wherein an input end of the bidirectional blocking circuit 24 is connected to the power input interface 21, an output end of the bidirectional blocking circuit is connected to the charging control circuit 23, a controlled end is connected to the charging management chip 22, a controlled end of the charging control circuit 23 is connected to the charging management chip 22, an output end is connected to the battery to realize control of a charging current of the battery, an input end of the input voltage detection circuit 26 is connected to the power input interface 21, an output end is connected to the charging management chip 22, an input end of the input current detection circuit 27 is connected to an input end of the charging control circuit 23, an output end of the charging current detection circuit 28 is connected to an output end of the charging control circuit 23, an output end of the charging management chip 22 is connected to the charging management chip 22, an output end of the charging control circuit 29 is connected to the battery management chip, an output end is connected to the power supply path selection circuit 1, and the power supply path selection circuit is connected to the power supply chip 22.
It should be noted that, as shown in fig. 4, during charging, the power input interface 21 is connected to an external power source through the power adapter, the charging management chip 22 sends a PWM control signal to the charging control circuit 23 to control and change the charging current to the battery, the input voltage detection circuit 26 and the input current detection circuit 27 can transmit the voltage and current information input through the power input interface 21 to the charging management chip 22, the charging current detection circuit 28 can transmit the charging current information to the charging management chip 22, the battery voltage detection circuit 29 can see the voltage information of the battery to the charging management chip 22, and further obtain the voltage and electric quantity conditions of the battery, when the voltage at the input end is abnormal, the charging management chip 22 cuts off the signal output, stops charging and sends an abnormal signal to the main control module 1, and the charging management chip 22 also can set according to the electric quantity and the internal conditions of the battery during charging, under different electric quantity, the charging control circuit 23 is controlled to output the current of the battery, a reasonable current curve under different electric quantity is realized, quick charging under low electric quantity, slow charging under high electric quantity and battery protection are realized, the charging management chip 22 can continuously adjust output signals according to the combination of the input current and the charging current, the accurate control of the charging current is realized, the charging curve is stable under the stage electric quantity, constant current charging in a corresponding time end is maintained, the charging stability is ensured, the power supply path selection circuit 25 can automatically select a power supply object for the charging management chip 22, when an external power supply is connected, the power supply is supplied to the charging management chip 22 through the power supply input interface 21, the battery efficiency and the service life are improved, when the external power supply is not connected, the power supply is supplied to the charging management chip 22 through the battery, at the moment, the charge management chip 22 also transmits battery power information to the main control module 1, and timely reminds about power consumption, and when charging is not needed, the charge management chip 22 also cuts off the connection between the power input interface 21 and the battery in a bidirectional way through the bidirectional blocking circuit 24, so that the battery is protected and meanwhile reverse output of battery voltage is prevented.
In one embodiment of the present invention, the bidirectional blocking circuit 24 includes a first MOS transistor and a second MOS transistor, gates of the first MOS transistor and the second MOS transistor are connected to an output end of the charge management chip 22, a drain electrode of the first MOS transistor is connected to the power input interface 21, a source electrode of the first MOS transistor is connected to a source electrode of the second MOS transistor, and a drain electrode of the second MOS transistor is connected to the charge control circuit 23; the power supply path selection circuit 25 includes a first diode and a second diode, where an anode of the first diode is connected to the power input interface 21, an anode of the second diode is connected to the battery, and a cathode of the first diode and a cathode of the second diode are connected to a power supply terminal of the charge management chip 22.
It should be noted that, as shown in fig. 4, the bidirectional blocking circuit 24 is controlled by the charge management chip 22 to switch on and off, when the battery is fully charged, the bidirectional blocking circuit 24 is turned off to cut off the power output to the battery, so as to improve the service life of the battery, when the external power is not connected, the bidirectional blocking circuit 24 is turned off to prevent the battery power from being connected with the power input interface 21, prevent the power input interface 21 from being electrified and causing power waste or the power input interface 21 from being connected with a conductor in error to cause a short circuit, the bidirectional blocking circuit 24 is composed of two p_mos tubes relatively connected in series, wherein, the triode Q3 is a first MOS tube, the triode Q5 is a second MOS tube, and because of the connection relation between the source electrode and the drain electrode in the p_mos tube, the internal protection diodes are opposite in direction, the power supply between the battery and the power input interface 21 through the protection diodes can be effectively avoided, and when the first MOS tube and the second MOS tube are turned off, the circuit is turned on only when the first MOS tube and the second MOS tube receive the signal of the charge management chip 22, the control is more effective; in the electrical path selection circuit, the diodes D10 and D11 are respectively a first diode and a second diode, and due to the conduction characteristic of the diodes, when an external power supply is connected, the external power supply supplies power to the charge management chip 22, and when the external power supply is not connected, the battery is automatically switched to supply power to the charge management chip 22 so as to ensure the stable operation of the charge management chip 22, monitor the battery state in real time and send out a prompt, thereby ensuring the convenient use of the system.
In one embodiment of the present invention, the charge control circuit 23 includes a third MOS transistor, a fourth MOS transistor, and a first inductor, gates of the third MOS transistor and the fourth MOS transistor are respectively connected to one PWM signal end of the charge management chip 22, a drain of the third MOS transistor is connected to an output end of the bidirectional blocking circuit 24, a source of the third MOS transistor is connected to a first end of the first inductor, a drain of the fourth MOS transistor is connected to the first end of the first inductor, a source of the fourth MOS transistor is grounded, and an output end of the first inductor is connected to the battery.
It should be noted that, as shown in fig. 4, the MOS transistors Q6 and Q7 are a third MOS transistor and a fourth MOS transistor, the inductor L7 is a first inductor, the 23 rd and 26 th pins of the charging management chip 22 output PWM signals to control the third MOS transistor and the fourth MOS transistor, so as to realize charging and discharging control of the first inductor, change the interval and frequency of the PWM signals, and change the charging and discharging duration and frequency of the first inductor, so as to control the charging voltage and the charging current, and continuously regulate the PWM signals in combination with the feedback signals of the charging current detection circuit 28 and the battery voltage detection circuit 29, so that stable current charging of the battery can be realized, and the influence of external power supply fluctuation is avoided.
In an embodiment of the present invention, the rapid identification system of the soil non-excavation navigator further includes a communication module 5, a man-machine interaction module 6, and a PH detection module 7, where the communication module 5 is connected to the main control module 1 and is used for communication between the main control module 1 and the cloud platform, the man-machine interaction module 6 is connected to the main control module 1 and is used for operation of a user, and the PH detection module 7 is connected to the main control module 1 and is used for transmitting detected PH information of the soil to the main control module 1.
It should be noted that, as shown in fig. 5, the main control module 1 can transmit the collected soil data to the cloud platform through the communication module 5, meanwhile, the user can also remotely send a control signal, the man-machine interaction module 6 can adopt keys, a display screen and the like, so that the operation of the user is convenient, the system is further provided with the PH detection module 7, and the applicability is wider when the soil component is detected.
In one embodiment of the present invention, the PH detection module 7 includes a PH value acquisition circuit 71, a two-stage amplifying circuit 72, a photo-isolation circuit 73, and a follower circuit 74, where an input end of the PH value acquisition circuit 71 is connected to a PH sensor, an output end of the PH value acquisition circuit is connected to an input end of the two-stage amplifying circuit 72, an output end of the two-stage amplifying circuit 72 is connected to an input end of the photo-isolation circuit 73, an output end of the photo-isolation circuit 73 is connected to an input end of the follower circuit 74, and an output end of the follower circuit 74 is connected to the master control module 1.
It should be noted that, because the pH detection is sensitive to environmental noise, the pH value of the soil is collected by using a potential method by the probe with the shielding signal supported by the design hardware, the pH value is essentially determined by measuring the voltage difference between the two electrodes, the probe portion adopts a low-power design, and the power supply of the probe portion is turned on only after the system portion initiates the pH value test command, as shown in fig. 4, in the pH value detection module 7, the two-stage amplifying circuit 72 adopts a multi-stage operational amplifier design, the dynamic range of sampling is improved, the operational amplifier output portion is isolated by the two linear optocouplers U4 and U5, and the follower circuit 74 is used for isolating and outputting after the optocoupler isolation, so that the sampling precision can be improved, and the mutual interference of the system power supply portion and the analog portion is avoided, in the pH value collection circuit 71, J1 is the pH detection probe, because the operational amplifier U1 is a positive and negative power supply (+5v, GND, -5V), and the pH value can be detected only by detecting the level change of the probe pair GND.
Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the invention.
Claims (10)
1. A rapid identification system for a soil trenchless navigator, comprising: the device comprises a main control module (1), a power supply module (2), a temperature detection circuit (3) and a metal content detection module (4), wherein the metal content detection module (4) comprises a light source driving circuit (41), a digital micromirror controller (42), a photoelectric detector (43) and a sampling circuit (44), the input end of the light source driving circuit (41) is connected with the power supply module (2), the controlled end is connected with the main control module (1), the output end is connected with the light source so as to adjust the output current of the light source, the input end of the photoelectric detector (43) is connected with the digital micromirror controller (42) so as to convert a reflected light signal received by the digital micromirror controller (42) into an electric signal, the input end of the sampling circuit (44) is connected with the output end of the photoelectric detector (43), the output end is connected with the main control module (1) so as to transmit the electric signal to the main control module (1), and the temperature detection circuit (3) is connected with the main control module (1) so as to transmit internal temperature information to the main control module (1).
2. The rapid identification system of a soil trenchless navigator according to claim 1, wherein the light source driving circuit (41) comprises a voltage stabilizing circuit (411) and an output current control circuit (412), the input end of the voltage stabilizing circuit (411) is connected with the power module (2), the output end is connected with the input end of the output current control circuit (412), the controlled end of the output current control circuit (412) is connected with the main control module (1), and the output end is connected with the light source.
3. The rapid identification system of a soil trenchless navigator according to claim 2, wherein the voltage stabilizing circuit (411) comprises a first power conversion chip and a switching value isolation circuit, the input end of the switching value isolation circuit is connected with the main control module (1), the output end is connected with the enabling end of the first power conversion chip, the input end of the first power conversion chip is connected with the power module (2), and the output end is connected with the output current control circuit (412); the output current control circuit (412) comprises a first current output chip, a power supply filter circuit, a first amplifying circuit and a current sampling circuit (44), the current sampling circuit (44) comprises a first sampling resistor and a first current sensing amplifier, a first input end of the first amplifying circuit is connected with an output end of the voltage stabilizing circuit (411) through the power supply filter circuit, an input end of the first amplifying circuit is connected with the main control module (1), an output end of the first amplifying circuit is connected with a controlled end of the first current output chip, the first sampling resistor is arranged between the light source and the ground, two input ends of the first current sensing amplifier are respectively connected with two ends of the first sampling resistor, and an output end of the first amplifying circuit is connected with a second input end of the first current output chip so as to realize accurate control of light source current.
4. The rapid identification system of a soil trenchless navigator according to claim 1, wherein the sampling circuit (44) comprises a second amplifying circuit (441), a third amplifying circuit (442) and a first digital-to-analog conversion circuit (443), two output ends of the photodetector (43) are respectively connected with an input end of the first digital-to-analog conversion circuit (443) through the second amplifying circuit (441) and the third amplifying circuit (442), and an output end of the first digital-to-analog conversion circuit (443) is connected with the main control module (1).
5. The rapid identification system of a soil trenchless navigator according to claim 1, wherein the power module (2) comprises a power supply conversion circuit and a charging circuit, the input end of the power supply conversion circuit is connected with a battery, the output end of the power supply conversion circuit is respectively connected with the main control module (1) and the metal content detection module (4), the input end of the charging circuit is suitable for being connected with an external power supply, and the output end of the charging circuit is connected with the battery.
6. The rapid identification system of a soil trenchless navigator according to claim 5, wherein the charging circuit comprises a power input interface (21), a charge management chip (22), a charge control circuit (23), a bidirectional blocking circuit (24), a power supply path selection circuit (25), an input voltage detection circuit (26), an input current detection circuit (27), a charge current detection circuit (28) and a battery voltage detection circuit (29), the input of the bidirectional blocking circuit (24) is connected to the power input interface (21), the output is connected to the charge control circuit (23), a controlled end is connected to the charge management chip (22), a controlled end of the charge control circuit (23) is connected to the charge management chip (22), an output end is connected to the battery to realize control of a charge current of the battery, an input end of the input voltage detection circuit (26) is connected to the power input interface (21), an output end of the input current detection circuit (27) is connected to the charge management chip (22), an input end of the input current detection circuit (27) is connected to the charge control circuit (23), an output end of the charge control circuit (23) is connected to the charge management chip (22), the input end of the battery voltage detection circuit (29) is connected with the battery, the output end of the battery voltage detection circuit is connected with the charging management chip (22), the communication end of the charging management chip (22) is connected with the main control module (1), the first input end of the power supply path selection circuit (25) is connected with the power input interface (21), the second input end of the power supply path selection circuit is connected with the battery, and the output end of the power supply path selection circuit is connected with the power end of the charging management chip (22).
7. The rapid identification system of a soil trenchless navigator according to claim 6, wherein the bidirectional blocking circuit (24) comprises a first MOS transistor and a second MOS transistor, gates of the first MOS transistor and the second MOS transistor are connected to an output end of the charge management chip (22), a drain electrode of the first MOS transistor is connected to the power input interface (21), a source electrode of the first MOS transistor is connected to a source electrode of the second MOS transistor, and a drain electrode of the second MOS transistor is connected to the charge control circuit (23); the power supply path selection circuit (25) comprises a first diode and a second diode, wherein the anode of the first diode is connected with the power input interface (21), the anode of the second diode is connected with the battery, and the cathode of the first diode and the cathode of the second diode are connected with the power end of the charging management chip (22).
8. The rapid identification system of a soil trenchless navigator according to claim 6, wherein the charge control circuit (23) comprises a third MOS transistor, a fourth MOS transistor and a first inductor, gates of the third MOS transistor and the fourth MOS transistor are respectively connected with a PWM signal end of the charge management chip (22), a drain of the third MOS transistor is connected with an output end of the bidirectional blocking circuit (24), a source of the third MOS transistor is connected with a first end of the first inductor, a drain of the fourth MOS transistor is connected with the first end of the first inductor, a source of the fourth MOS transistor is grounded, and an output end of the first inductor is connected with the battery.
9. The rapid identification system of a soil non-excavation navigator according to any one of claims 1 to 8, further comprising a communication module (5), a man-machine interaction module (6) and a PH detection module (7), wherein the communication module (5) is connected with the main control module (1) and is used for communication between the main control module (1) and a cloud platform, the man-machine interaction module (6) is connected with the main control module (1) and is used for operation of a user, and the PH detection module (7) is connected with the main control module (1) and is used for transmitting detected soil PH information to the main control module (1).
10. The rapid identification system of a soil trenchless navigator according to claim 9, wherein the PH detection module (7) comprises a PH acquisition circuit (71), a two-stage amplification circuit (72), a photoelectric isolation circuit (73) and a follower circuit (74), wherein the input end of the PH acquisition circuit (71) is connected with a PH sensor, the output end is connected with the input end of the two-stage amplification circuit (72), the output end of the two-stage amplification circuit (72) is connected with the input end of the photoelectric isolation circuit (73), the output end of the photoelectric isolation circuit (73) is connected with the input end of the follower circuit (74), and the output end of the follower circuit (74) is connected with the main control module (1).
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