CN209182685U - A kind of dedicated instrument telemetry circuit of original position nutrient salt analyzer - Google Patents
A kind of dedicated instrument telemetry circuit of original position nutrient salt analyzer Download PDFInfo
- Publication number
- CN209182685U CN209182685U CN201920006939.7U CN201920006939U CN209182685U CN 209182685 U CN209182685 U CN 209182685U CN 201920006939 U CN201920006939 U CN 201920006939U CN 209182685 U CN209182685 U CN 209182685U
- Authority
- CN
- China
- Prior art keywords
- circuit
- power supply
- resistance
- pin
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The utility model discloses a kind of dedicated instrument telemetry circuits of nutrient salt analyzer in situ, including power supply power supply unit, main control chip circuit, analog to digital conversion circuit, PLC AM access module, temperature measuring circuit, luminous intensity measurement circuit, photoelectric sensor measuring circuit, liquid leakage measuring circuit and stepper motor drive control circuit；Main control chip circuit connects temperature measuring circuit and luminous intensity measurement circuit by analog to digital conversion circuit；PLC AM access module includes each input interface for connecting with each data input pin of external PLC and each output interface for connecting with each data output end of external PLC；PLC AM access module connects photoelectric sensor measurement module and liquid leakage measuring circuit by input interface, is connected with control circuit for heater and stepper motor drive control circuit by output interface；Power supply power supply unit is above-mentioned each component power supply.The utility model can satisfy the demand of all component measurements and control in nutrient salt analyzer in situ.
Description
Technical field
The utility model relates to observation and control technology field, the in particular to dedicated instrument observing and controlling of a kind of nutrient salt analyzer in situ
Circuit.
Background technique
Nutrient salt analyzer in situ is by temperature sensor, leakage sensor, heater, stepper motor driver, photoelectric transfer
The composition such as sensor, detection circuit, programmable logic controller (PLC).Therefore, it is necessary to a kind of instrument telemetry circuits to above-mentioned component part
Input signal measure and motion parts are controlled.
Instrument telemetry circuit plate on the market is mostly specially designed for a certain instrument at present, not can satisfy original
The equipment circuit plate of position nutrient salt analyzer observing and controlling demand.Partial circuit in them may may be implemented to nutrient salt in situ
The measurement or control of the section components of analyzer, but and not all circuit be all able to satisfy the required of nutrient salt analyzer in situ simultaneously
The technical parameters such as mechanical dimension, supplied character, observing and controlling interface.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the prior arts and deficiency provide a kind of nutrient salt analyzer in situ
Dedicated instrument telemetry circuit, the circuit can satisfy the demand of all component measurements and control in nutrient salt analyzer in situ.
The purpose of this utility model is achieved through the following technical solutions: a kind of dedicated instrument of original position nutrient salt analyzer is surveyed
Circuit is controlled, accesses mould including power supply power supply unit, main control chip circuit, analog to digital conversion circuit, the PLC for connecting external PLC
Block, temperature measuring circuit, luminous intensity measurement circuit, photoelectric sensor measuring circuit, liquid leakage measuring circuit and stepper motor
Drive control circuit；
The main control chip circuit connects temperature measuring circuit and luminous intensity measurement circuit by analog to digital conversion circuit；It is described
PLC outside main control chip circuit connection；
The PLC AM access module includes each input interface for connecting with each data input pin of external PLC and is used for
Each output interface being connect with each data output end of external PLC；Wherein PLC AM access module connects photoelectric sensing by input interface
Device measurement module and liquid leakage measuring circuit；PLC AM access module is connected with control circuit for heater and step by output interface
Into motor driving controling circuit；
The power supply power supply unit connection master chip circuit, temperature measuring circuit, photoelectric sensor measurement module, liquid are let out
Leak measuring circuit, stepper motor drive control circuit and heating control circuit.
Preferably, the temperature measuring circuit, luminous intensity measurement circuit, photoelectric sensor measuring circuit, liquid leakage are surveyed
The number for measuring circuit and stepper motor drive control circuit is one or more；
It include for the light intensity sensor with external nutrient salt analyzer in situ in the output interface of PLC AM access module
First output interface of light source connection, the light intensity that external PLC passes through the external nutrient salt analyzer in situ of the first output interface connection
Spend sensor light source.
Preferably, the temperature measuring circuit includes current signal transmitter XTR105 and triode Q1；The two of XTR105
Slide rheostat RL1 is connected between a RG pin, the VIN+ pin and IR2 pin of XTR105 connects and composes the port A, XTR105's
IR2 pin and VIN- pin are separately connected one end of slide rheostat RL2, the sliding end of slide rheostat RL2 and XTR105's
IR2 pin is connected with VIN- pin, and the other end of resistance RL2 constitutes the port B, and the IRET pin of XTR105 is connected by resistance R17
The port B is connect, capacitor C31 is parallel on resistance R17；The VLIN pin of XTR105 passes through the port resistance R16 connection A；The temperature
Measuring circuit connects external temperature sensor with the port B by the port A, gets the signal of external temperature sensor output；
The B pin and E pin of XTR105 is separately connected base stage and the pole C of triode Q1；The collector of triode Q1 connects
The V+ pin of XTR105；Power supply power supply unit is connected after the V+ pin differential concatenation diode of XTR105, passes through power supply power supply list
Member gets DC supply input；The V+ pin of XTR105 passes through the I/O pin of capacitance connection XTR105, and the I/O pin of XTR105 connects
Connect the input end of analog signal of analog to digital conversion circuit.
Preferably, the luminous intensity measurement circuit includes resistance R32 and resistance R35, and the one end the resistance R32 constitutes C-terminal
Mouthful, it is grounded after other end series resistance R35, the simulation letter for one end connection analog to digital conversion circuit that resistance R32 is connected with resistance R35
Number input terminal；Resistance R35 is parallel with capacitor C38；The luminous intensity measurement circuit connects external nutrient salt in situ by C port
The signal output end of the light intensity sensor of analyzer.
Preferably, the liquid leakage measuring circuit includes triode Q3, triode Q5, resistance R20 and resistance in parallel
R22, resistance R24 in parallel and resistance R26 and the electronics R28 and resistance R30 of parallel connection；
The base stage of triode Q3 constitutes the port D, and one end of resistance R20 and resistance R22 parallel connection constitutes the port E, resistance R20 with
The other end of resistance R22 parallel connection connects power supply power supply unit, gets DC supply input by power supply power supply unit；Triode Q3
Emitter ground connection, be connected with capacitor C34 between the emitter and base stage of triode Q3；Resistance R24 and resistance R26 it is in parallel one
Hold connecting triode Q3 collector, another termination power supply power supply unit of resistance R24 and resistance R26 parallel connection；
The collector of the base stage connecting triode Q3 of triode Q5；The emitter of triode Q5 is grounded, the hair of triode Q5
Capacitor C36 is connected between emitter-base bandgap grading and base stage；One end connecting triode Q5 collector of resistance R28 and resistance R30 parallel connection, resistance
Another termination power supply power supply unit of R28 and resistance R30 parallel connection；The input of the collector connection PLC AM access module of triode Q5
Interface connects the input terminal of external PLC by the input interface of PLC AM access module；
Liquid leakage measuring circuit connects the signal output end of external water droplet sensor by the port D with the port E.
Preferably, photoelectric sensor measurement module includes first interface, second interface, third interface and the 4th interface；Its
Middle first interface connects power supply power supply unit, gets DC supply input by power supply power supply unit；Second interface ground connection；Third
Interface and the 4th interface are separately connected the input interface of PLC AM access module；Photoelectric sensor measurement module by first interface and
Second interface connects the power end of external photoelectric sensor, and the power end of external photoelectric sensor is connect by first interface and second
Mouth gets the direct current of power supply power supply unit output；Photoelectric sensor measurement module is connected by third interface and the 4th interface
The signal output end of photoelectric sensor, external PLC get the letter of photoelectric sensor output by third interface and the 4th interface
Number.
Preferably, the stepper motor drive control circuit includes solid-state relay, diode D14, diode D15, electricity
Hinder R47, resistance R48 and resistance R49；The diode D14 and diode D15 is Transient Suppression Diode；
The input negative terminal of the solid-state relay passes through the output interface of resistance R47 connection PLC AM access module, resistance R47
One end connection diode D15 anode connected with the output interface of PLC AM access module, diode D15 cathode connect power supply power supply
Unit；The input anode of solid-state relay connects power supply power supply unit；The output plus terminal of solid-state relay connects power supply power supply list
Member；The cathode of the output negative terminal connection diode D14 of solid-state relay, the plus earth of diode D14 constitute the end F, solid-state after
The output negative terminal of electric appliance constitutes the end G；The output interface of one end connection PLC AM access module of resistance R48, the other end of resistance R48
Constitute the end H；The output interface of one end connection PLC AM access module of resistance R49, the other end of resistance R49 constitute the end I；
Stepper motor drive control circuit be connected respectively by the end F, the end G, the end H and the end I f external motor cathode,
Anode, positive and negative rotation control terminal and start end.
Preferably, the control circuit for heater include solid-state relay, diode D12, diode D13, resistance R46 and
Resistance R49；The diode D12 and diode D13 is Transient Suppression Diode；
The input negative terminal of the solid-state relay passes through the output interface of resistance R46 connection PLC AM access module, resistance R46
One end connection diode D13 anode connected with the output interface of PLC AM access module, diode D13 cathode connect power supply power supply
The input anode of unit, solid-state relay connects power supply power supply unit；
The DC power output end of the output plus terminal connection power supply power supply unit of solid-state relay；The output of solid-state relay
Negative terminal connects the cathode of diode D12, and the plus earth of diode D12 constitutes the end J, and the output negative terminal of solid-state relay constitutes K
End；The control circuit for heater connects external heater with the end K by the end J, to control the control of external heater.
Preferably, the power supply power supply unit includes protecting circuit, 24V power supply electricity for connecting the access of external power supply
Road, main power source rail control circuit, positive and negative 12V power circuit, 5V power circuit, 3.3V power circuit and 3V battery circuit；
The output end of the access protection circuit connects 24V power circuit, and the voltage of 24V is generated by 24V power circuit；
The output end of the access protection circuit connects main power source rail control circuit, is exported by main power source rail control circuit
Main power source；The output interface of the control terminal connection PLC AM access module of the main power source rail control circuit, passes through PLC AM access module
Output interface connect the output end of external PLC；
The main power source output end of the main power source rail control circuit is separately connected positive and negative 12V power circuit and 5V power circuit
Input terminal, the DC power supply of positive and negative 12V is generated by positive and negative 12V power circuit, pass through 5V power circuit generate 5V voltage；
The input terminal of the output end connection 3.3V power circuit of the 5V power circuit, is generated by 3.3V power circuit
The voltage of 3.3V.
Further, the access protection circuit includes protector F1 and diode D5, the diode D5 are transient state
Inhibit diode, the one end protector F1 constitutes the end L, and the other end is connected with diode D5 cathode, and the anode of diode D5 constitutes the end M
And it is grounded, capacitor C46 is connected between the cathode and anode of diode D5, access protection circuit is right respectively by the end L and the end M
The anode and cathode of external 12V DC power supply should be connected；The cathode and anode of diode D5, which respectively corresponds, constitutes access protection
The power supply output plus terminal and negative terminal of circuit；
The 24V power circuit includes power module VRB1224ZP, the Vin pin and GND of power module VRB1224ZP
Pin is connected respectively the power supply output plus terminal and negative terminal of access protection circuit；+ V0 the pin of power module VRB1224ZP is logical
Cross capacitor C47 ground connection, the 0V pin ground connection of power module VRB1224ZP；24V power circuit passes through power module VRB1224ZP
Export the voltage of 24V；
The main power source rail control circuit includes solid-state relay, diode D6, diode D7 and resistance R38, and described two
Pole pipe D6 and diode D7 is Transient Suppression Diode, and the input negative terminal of solid-state relay connects PLC AM access module by resistance R38
Output interface, the output end of external PLC is connected by the output interface of PLC AM access module；Resistance R38 and PLC AM access module
Output interface connection one end connection diode D6 anode, the cathode of diode D3, the input anode of solid-state relay and
The output plus terminal of solid-state relay is all connected with the power supply output plus terminal of access protection circuit；The output of main power source rail control circuit is just
The cathode of end connection diode D7, the plus earth of diode D7；The output plus terminal of main power source rail control circuit constitutes main electricity
The main power source output end of source rail control circuit；
The positive and negative 12V power circuit includes power module WRA1212S and inductance L1；Wherein one end connection of inductance L1
The main power source output end of main power source rail control circuit, and be grounded by capacitor C42, the other end of inductance L1 connects power module
The VIN pin of the VIN pin of WRA1212S, power module WRA1212S is grounded by capacitor C43, power module WRA1212S's
GND pin ground connection；+ V0 the pin of the Ctrl pin floating of power module WRA1212S, power module WRA1212S passes through capacitor
- V0 the pin of C41 connection 0V pin, power module WRA1212S passes through capacitor C44 connection 0V pin, the 0V pin of WRA1212S
Ground connection；The voltage that positive and negative 12V power circuit passes through the+V0 pin output+12V of power module WRA1212S；Positive and negative 12V power supply electricity
The voltage that road passes through the-V0 pin output -12V of power module WRA1212S；
The 5V power circuit includes power supply chip MP1469, resistance R39, resistance R40, resistance R41, resistance R42, resistance
R43 and inductance L3；The IN pin of the power supply chip MP1469 passes through resistance R40 connection EN pin, power supply chip MP1469's
IN pin passes through capacitor C48 and capacitor C49 ground connection respectively；The IN pin of power supply chip MP1469 connects main power source rail control circuit
Main power source output end, power supply chip MP1469 GND pin ground connection, the BST pin serial connection resistance R39 of power supply chip MP1469
With connection SW pin after capacitor C52, one end of the SW pin connection inductance L3 of power supply chip MP1469, the other end of inductance L3 leads to
It crosses concatenated resistance R42 and connects FB pin with resistance R41, one end that resistance R42 is connected with resistance R41 is grounded by resistance R43,
The other end of inductance L3 is grounded by capacitor C54, and 5V power circuit exports the voltage of 5V by the other end of inductance L3；
The 3.3V power circuit includes power supply chip TPS73733, the IN pin connection of the power supply chip TPS73733
EN pin, and connected with 5V power circuit output end, while the IN pin of power supply chip TPS73733 is connect by capacitor C51
Ground, the GND pin ground connection of power supply chip TPS73733；The OUT pin of power supply chip TPS73733 is grounded by capacitor C52, electricity
The NR pin of source chip TPS73733 is grounded by capacitor C53；3.3V power circuit exports the voltage of 3.3V by OUT pin.
The utility model compared with the existing technology have following advantages and effects
(1) the utility model instrument telemetry circuit is applied to nutrient salt analyzer in situ, and main control chip circuit passes through modulus
Conversion circuit gets nutrient salt analyzer relevant temperature in original position measured by temperature measuring circuit and luminous intensity measurement circuit
Information and intensity information, and send external PLC to；PLC access is provided in the utility model instrument telemetry circuit
Module includes each input interface for connecting with each data input pin of external PLC in PLC AM access module and is used for and outside
Each output interface of each data output end connection of PLC, photoelectric sensor measurement module connect PLC with liquid leakage measuring circuit and connect
The information measured can be sent external PLC, control circuit for heater and step by input interface by the input interface for entering module
Into the output interface of motor driving controling circuit connection PLC AM access module, external PLC passes through the heater that output interface is connected
Control circuit and stepper motor drive control circuit in nutrient salt analyzer in situ heater and stepper motor control
System, further includes in addition power supply power supply unit in the utility model instrument telemetry circuit, can be instrument by the power supply power supply unit
All components and outside PLC in device telemetry circuit etc. are powered.Therefore, the utility model instrument telemetry circuit can expire
The demand of all component measurements and control in the nutrient salt analyzer of foot original position.
(2) it in the utility model instrument telemetry circuit, is measured by the temperature that analog to digital conversion circuit is connect with main control chip
Circuit, luminous intensity measurement circuit number can be one or more, as of temperature measuring circuit and luminous intensity measurement circuit
When number is multiple, the available temperature information and luminous intensity letter to the multiple positions of nutrient salt analyzer in situ of main control chip circuit
Breath；The information that wherein main control chip circuit is directed to that every road temperature measuring circuit and luminous intensity measurement circuit are sent carries out digital letter
Number filtering processing, with from time dimension obtain temperature information and intensity information average value, to obtain more accurate
Temperature information and intensity information；Processing of the main control chip circuit to temperature information and intensity information simultaneously, can effectively drop
The low processing load of external PLC.In addition, photoelectric sensor measuring circuit, liquid are let out in the utility model instrument telemetry circuit
The number for leaking measuring circuit and stepper motor drive control circuit can be multiple for one, when photoelectric sensor measuring circuit is more
When a, external PLC can be directed to more simultaneously by multiple photoelectric sensor measuring circuits in the utility model instrument telemetry circuit
The moving component of a corresponding motor control is monitored；When the number of stepper motor drive control circuit is multiple, PLC can be with
By stepper motors multiple outside multiple stepper motor drive control circuits in the utility model instrument telemetry circuit, when
When liquid leakage measuring circuit is multiple, external PLC is surveyed by multiple liquid leakages in the utility model instrument telemetry circuit
The liquid leakage monitoring of the multiple positions of nutrient salt analyzer in situ may be implemented in amount circuit.
It (3) include for former with outside in the utility model instrument telemetry circuit, in the output interface of PLC AM access module
First output interface of the light intensity sensor light source connection of position nutrient salt analyzer, external PLC are connected by the first output interface
The light intensity sensor light source of external nutrient salt analyzer in situ is connect, therefore by the utility model instrument telemetry circuit, it is external
PLC can be controlled for the light source of the light intensity sensor of nutrient salt analyzer in situ simultaneously, realize nutrient salt in situ
The detection work of analyzer.
(4) in the utility model instrument telemetry circuit, power supply power supply unit includes protecting for connecting the access of external power supply
Protection circuit, 24V power circuit, main power source rail control circuit, positive and negative 12V power circuit, 5V power circuit, 3.3V power circuit with
And 3V battery circuit, therefore can satisfy various power supply requirements, including 24V, positive and negative 12V, 5V, 3.3V and 3V, it can be instrument
The component of various voltage swing demands provides voltage in telemetry circuit and nutrient salt analyzer in situ.Meanwhile in the utility model
In, main power source rail control circuit can control the positive and negative 12V power circuit of next stage output circuit, 5V power supply electricity by external PLC
Whether road, 3.3V power circuit export relevant voltage, have the advantages that the control flexibility of power supply power supply unit is high.
Detailed description of the invention
Fig. 1 is the structural block diagram of the utility model instrument telemetry circuit.
Fig. 2 is the main control chip circuit diagram of the utility model instrument telemetry circuit.
Fig. 2 a is the circuit diagram of the utility model RS-485 communication module.
Fig. 3 is the schematic diagram of temperature measuring circuit in the utility model instrument telemetry circuit.
Fig. 4 is the schematic diagram of luminous intensity measurement circuit in the utility model instrument telemetry circuit.
Fig. 5 is the schematic diagram of liquid leakage measuring circuit in the utility model instrument telemetry circuit.
Fig. 6 is the structure chart of photoelectric sensor measurement module in the utility model instrument telemetry circuit.
Fig. 7 is the schematic diagram of stepper motor drive control circuit in the utility model instrument telemetry circuit.
Fig. 8 is the schematic diagram of control circuit for heater in the utility model instrument telemetry circuit.
Fig. 9 a is the original of access protection circuit 24V power circuit in the utility model instrument telemetry circuit power supply power supply unit
Reason figure.
Fig. 9 b is main power source rail control circuit and 5V power supply electricity in the utility model instrument telemetry circuit power supply power supply unit
The schematic diagram on road.
Fig. 9 c is the schematic diagram of positive and negative 12V power circuit in the utility model instrument telemetry circuit power supply power supply unit.
Fig. 9 d is the schematic diagram of 3.3V power circuit in the utility model instrument telemetry circuit power supply power supply unit.
Specific embodiment
The present invention will be further described in detail with reference to the embodiments and the accompanying drawings, but the implementation of the utility model
Mode is without being limited thereto.
Embodiment
Present embodiment discloses a kind of dedicated instrument telemetry circuits of nutrient salt analyzer in situ, as shown in Figure 1, including electricity
Source power supply unit, main control chip circuit, analog to digital conversion circuit and the PLC AM access module for connecting external PLC.In the present embodiment
In, instrument telemetry circuit can be set on one piece of circuit board, and the specification of the block circuit board can be with are as follows: and length is 172.5 millimeters,
Width is 88.5 millimeters.
Main control chip circuit connects temperature measuring circuit and luminous intensity measurement circuit by AD conversion unit, for measuring
Temperature information and intensity information；PLC outside the main control chip circuit connection, main control chip by the temperature information measured and
Intensity information is sent to external PLC.
PLC AM access module include each input interface for being connect with each data input pin of external PLC and for it is outer
Each output interface of each data output end connection of portion PLC；Wherein the input interface of PLC AM access module is connected with photoelectric sensor survey
Measure circuit, liquid leakage measuring circuit and stepper motor drive control circuit；The output interface of PLC AM access module is connected with heating
Control circuit.It in the present embodiment, is external PLC connected to it by the name definition of input interface each in PLC AM access module
The identical title of each data input pin, i.e. input interface Xi, i=0,1,2,3 ..., by output interface each in PLC AM access module
Name definition is the identical title of each data output end of external PLC connected to it, i.e. Yi, i=0,1,2,3 ... A, B, C ....
In the present embodiment, it is directed to each input interface and each output interface of PLC AM access module, can be installed on circuit boards to more
A terminal, external PLC pass through each pin on corresponding plug-in connection, so that each input terminal of outside PLC and PLC access mould
Each input interface of block connects, and each output end of external PLC is connected with each output interface of PLC AM access module.
Unit connection master chip circuit, temperature measuring circuit, luminous intensity measurement circuit, the photoelectric sensor of power supply power supply are surveyed
Measure circuit, liquid leakage measuring circuit, stepper motor drive control circuit and heating control circuit；For main chip circuit, temperature
Spend measuring circuit, luminous intensity measurement circuit, photoelectric sensor measuring circuit, liquid leakage measuring circuit, stepper motor driving control
Circuit and heating control circuit power supply processed.
In the present embodiment, temperature measuring circuit, luminous intensity measurement circuit, photoelectric sensor measuring circuit, liquid leakage
The number of measuring circuit and stepper motor drive control circuit is one or more.
As shown in Fig. 2, the main control chip circuit in the present embodiment includes main control chip and its peripheral circuit module, in this reality
It applies in example, STM32L4 family chip can be used in main control chip, and peripheral circuit module includes master control electric source filter circuit, resets
Circuit, promoter region selection circuit, master control crystal oscillation clock circuit, programmable device access circuit, modulus communication interface and UART communication connect
Mouthful；Wherein:
Master control electric source filter circuit: each VDD pin of main control chip connects 3.3V power supply, each VSS pin connects electricity
Source.The capacitor that a 100nF is connected between each group of VDD and VSS pin, for 3.3V power filter.In each group
The higher level of 100nF capacitor connects the capacitor of a 4.7 μ F at 3.3V power import, for 3.3V power filter.3.3V
Power supply passes through the resistor of 20 Ω, into the VDDA pin of main control chip.VSSA pin connects power ground.In VDDA and VSSA
Between the capacitor of one 100nF of connection and the capacitor of a 1 μ F, be used for 3.3V power filter.
Reset circuit: by a touch-switch it is in parallel with 100nF capacitor then seal in the NRST pin of main control chip with
Between power ground, a reset circuit is formed.Capacitor plays the role of stable level.It can lead to after manually pressing touch-switch
Main control chip resets.
Promoter region selection circuit: the BOOT0 pin of main control chip is followed by three feet arranging by a 10k Ω resistor
On the crura intermedium of needle, resistor plays the role of current limliting.The two side legs of three feet row's needle are connected with 3.3V power supply and power ground respectively.
Left, the middle foot of three feet row's needle is connected using jumper cap or the connected chip promoter region that can play the role of of right, middle foot selects.
Master control crystal oscillation clock circuit: the capacitor for the 20pF that connects between the OSC-IN pin and power ground of main control chip
Device.It connects between OSC-OUT pin and power ground the capacitor of a 20pF.It connects between OSC-IN and OSC-OUT one
8MHz quartz crystal.Quartz crystal provides high speed outer clock source for exciting oscillation for main control chip.Capacitor plays matching
The effect of quartz crystal starting characteristic is conducive to make quartz crystal success starting of oscillation.The OSC32-IN pin and power supply of main control chip
The capacitor of one 20pF of series connection between ground.It connects between OSC32-OUT pin and power ground the capacitor of a 20pF.
It connects between OSC32-IN and OSC32-OUT a 32.768KHz quartz crystal.Quartz crystal is master control for exciting oscillation
Chip provides low speed external clock source.Capacitor plays the role of matching quartz crystal starting characteristic, is conducive to make quartz crystal
Success starting of oscillation.
Programmable device accesses circuit: the SWDIO pin of main control chip is connect with the 4th foot in five feet row's needle.SWCLK pin
It is connect with third foot.NRST foot is connect with crus secunda.3.3V power supply is connect with the 5th foot.Power ground is connect with the first foot；3.3V
The resistor that a 10k Ω is accessed between power supply and SWDIO, is used as pull-up resistor；One is accessed between power ground and SWCLK
The resistor of 10k Ω is used as pull down resistor.
Master control modulus communication interface: PA3, PA4, PA5, PA6, PA7, PB0 of main control chip are used as and analog to digital conversion circuit
The interface of module communication.
UART communication interface: PB1, PB10, PB11 of main control chip are used to connect the interface of RS-485 communication module communication.
In the present embodiment, external PLC is connect by RS-485 communication module with main control chip, realizes communication.As shown in Figure 2 a, in this reality
It applies in example, RS-485 communication module can use the RS-485 transceiving chip of SN65HVD1781.The R pin of SN65HVD1781 connects
The PB11 pin of main control chip, RE pin and DE pin connect the PB1 pin of main control chip, D pin meets the PB10 of main control chip and draws
Foot, the above are the interfaces of RS-485 communication module as UART communication part.The VCC pin of SN65HVD1781 connects 5V power supply, together
When connect GND pin by a 100nF capacitor and be followed by power ground, this capacitor is used for power filter.It leads in the present embodiment
It is poor by the A pin and B pin of SN65HVD1781 and the correspondence in corresponding RS-485 communication module in the PLC of outside to control chip
Sub-signal line connection, to realize communication.
In the present embodiment, analog to digital conversion circuit includes ADS1256 chip and its peripheral circuit, and peripheral circuit includes power supply
Filter circuit, reference power source circuit, crystal oscillation clock circuit, analog quantity acquisition circuit and modulus communication interface；ADS1256 chip is total
Have 9 pins that can acquire analog quantity, be AIN0, AIN1, AIN2, AIN3, AIN4, AIN5, AIN6, AIN7, AIN8 and
AINCOM.As shown in Figure 1, the number of luminous intensity measurement module is 3 when the number of temperature measuring circuit in the present embodiment is 2
It is a, it is needed in total using to above-mentioned wherein 5 analog quantitys of ADS1256 chip.
As shown in figure 3, temperature measuring circuit includes current signal transmitter XTR105 and triode Q1 in the present embodiment；
Slide rheostat RL1 is connected between two RG pins of XTR105, the VIN+ pin and IR2 pin of XTR105 connects and composes the end A
Mouthful, the IR2 pin and VIN- pin of XTR105 are separately connected one end of slide rheostat RL2, the sliding end of slide rheostat RL2
It is connect with the IR2 pin of XTR105 and VIN- pin, the other end of resistance RL2 constitutes the port B, and the IRET pin of XTR105 passes through
The port resistance R17 connection B is parallel with capacitor C31 on resistance R17；The VLIN pin of XTR105 passes through the port resistance R16 connection A；
Temperature measuring circuit connects external temperature sensor with the port B by the port A, gets the letter of external temperature sensor output
Number.The B pin and E pin of XTR105 is separately connected base stage and the pole C of triode Q1；The collector of triode Q1 connects XTR105
V+ pin；Power supply power supply unit is connected after the V+ pin differential concatenation diode of XTR105, is obtained by power supply power supply unit
To DC supply input；The V+ pin of XTR105 passes through the I/O pin of capacitance connection XTR105, and the I/O pin of XTR105 connects modulus
The input end of analog signal of conversion circuit.In the present embodiment, as shown in figure 3, being directed to each temperature measuring circuit, Ke Yi
The terminal J3 of one band, two pins is installed, two pins of terminal J3 are separately connected the end A of temperature measuring circuit on circuit board
Mouth and the port B, to facilitate the port A and the port B of external temperature sensor connection temperature measuring circuit.
In the present embodiment, as shown in figure 4, luminous intensity measurement circuit includes resistance R32 and resistance R35, the one end resistance R32
C port is constituted, is grounded after other end series resistance R35, one end that resistance R32 is connected with resistance R35 connects analog to digital conversion circuit
Input end of analog signal；Resistance R35 is parallel with capacitor C38；Luminous intensity measurement circuit connects external nutrition in situ by C port
The signal output end of the light intensity sensor of salt analyzer.In the present embodiment, include in the output interface of PLC AM access module
The first output interface for connect with the light intensity sensor light source of external in situ nutrient salt analyzer, external PLC pass through the
The light intensity sensor light source of the external nutrient salt analyzer in situ of one output interface connection.
In the present embodiment, it is directed to each luminous intensity measurement circuit, the end of 7 pins can be installed on circuit boards
Sub- J7, as shown in Figure 4,2 pins of terminal J7 connect C port, and 3 pins and 4 pins are separately connected two the first output interfaces
Y7 and Y8,5 pins and 7 pins are separately connected the DC power supply of the -12V and+12V of power supply power supply unit, 6 pins ground connection.It is external
Light intensity sensor can be connect by corresponding plug-in unit with terminal J7, so that the signal output end of external light intensity sensor connects
It is connected to the C port of luminous intensity measurement circuit, so that the cathode of two LED modules with different colors lamps of external light intensity sensor light source point
It is not correspondingly connected with to two first output interfaces Y7 and Y8, so that the anode of two LED modules with different colors lamps gets the straight of+12V
Galvanic electricity source, PLC can control two colors of light intensity sensor light source by controlling the output signal of two the first output interfaces
The light on and off of LED light.Therefore, in practical applications, as long as external light intensity sensor is arrived terminal J7 by the way that plug-in unit is critical, together
When may be implemented obtain external light intensity sensor output signal and control external light intensity sensor light source working.
In the present embodiment, as shown in Fig. 5 institute, liquid leakage measuring circuit includes triode Q3, triode Q5, parallel connection
Resistance R20 and resistance R22, resistance R24 in parallel and resistance R26 and the electronics R28 and resistance R30 of parallel connection；Triode Q3's
Base stage constitutes the port D, and one end of resistance R20 and resistance R22 parallel connection constitutes the port E, resistance R20 and resistance R22 parallel connection it is another
The 24V DC power supply of end connection power supply power supply unit, gets DC supply input by power supply power supply unit；The hair of triode Q3
Emitter grounding is connected with capacitor C34 between the emitter and base stage of triode Q3；One end of resistance R24 and resistance R26 parallel connection connects
Connect triode Q3 collector, the 24V DC power supply of another termination power supply power supply unit of resistance R24 and resistance R26 parallel connection；Three poles
The collector of the base stage connecting triode Q3 of pipe Q5；The emitter of triode Q5 is grounded, the emitter and base stage of triode Q5 it
Between be connected with capacitor C36；One end connecting triode Q5 collector of resistance R28 and resistance R30 parallel connection, resistance R28 and resistance R30
The 24V DC power supply of another termination power supply power supply unit in parallel；The input of the collector connection PLC AM access module of triode Q5
Interface X4 connects the input terminal of external PLC by the input interface of PLC AM access module.It in the present embodiment, can be in resistance R28
Light emitting diode D3 is set on the route connecting with resistance R30 with the input interface of PLC AM access module.
Liquid leakage measuring circuit connects the signal output end of external water droplet sensor by the port D with the port E.In this reality
It applies in example, is directed to each liquid leakage measuring circuit, the terminal J5 of one, band, two, band pin can be set on circuit boards；
1 pin and 2 pins of J5 is connected respectively the port D and the port E, and in actual use, external water droplet sensor passes through correspondence
Plug-in connection J5.
In the present embodiment, as shown in fig. 6, photoelectric sensor measurement module includes first interface, second interface, third interface
With the 4th interface；The wherein 24V DC power supply of first interface connection power supply power supply unit, is got by power supply power supply unit
24V DC supply input；Second interface ground connection；Two inputs that third interface and the 4th interface are separately connected PLC AM access module connect
Mouth X2 and X3；Photoelectric sensor measurement module connects the power end of external photoelectric sensor by first interface with second interface,
The power end of external photoelectric sensor gets the 24V direct current of power supply power supply unit output by first interface and second interface
Electricity；Photoelectric sensor measurement module connects the signal output end of photoelectric sensor, external PLC by third interface and the 4th interface
The signal of photoelectric sensor output is got by third interface and the 4th interface.In the present embodiment, as shown in fig. 6, being directed to
In each photoelectric sensor measurement module, 1 to 4 pin point of the terminal J19, J19 of 4 pins of a band are installed on circuit boards
It is other to should be used as first interface, second interface, third interface and third interface, in actual use, external photoelectric sensor is logical
Cross corresponding plug-in connection J19.
In the present embodiment, as shown in fig. 7, stepper motor drive control circuit include solid-state relay, diode D14,
Diode D15, resistance R47, resistance R48 and resistance R49；The diode D14 and diode D15 is that transient state inhibits two poles
Pipe；AQZ102 chip can be used in solid-state relay in the present embodiment.
The input negative terminal of solid-state relay passes through the output interface of resistance R47 connection PLC AM access module, resistance R47 and PLC
One end connection diode D15 anode of the output interface connection of AM access module, diode D15 cathode connect power supply power supply unit；
The input anode of solid-state relay connects power supply power supply unit；The output plus terminal connection power supply power supply unit of solid-state relay+
12V DC power supply；The cathode of the output negative terminal connection diode D14 of solid-state relay, the plus earth of diode D14 constitute F
The output negative terminal at end, solid-state relay constitutes the end G；The output interface Y1 of one end connection PLC AM access module of resistance R48, resistance
The other end of R48 constitutes the end H；The output interface Y0 of one end connection PLC AM access module of resistance R49, the other end structure of resistance R49
At the end I；
Stepper motor drive control circuit is connected respectively the cathode, just of external motor by the end F, the end G, the end H and the end I
Pole, positive and negative rotation control terminal and start end.In the present embodiment, as shown in fig. 7, being directed to each stepper motor drive control electricity
Road, can install the terminal J21 of 4 pins of a band on circuit boards, and four pins of terminal J21 are connected respectively stepping
Motor driving controling circuit passes through the end F, the end G, the end H and the end I.In the present embodiment, when stepper motor drive control circuit is more
When a, it is directed to one of stepper motor drive control circuit, the terminal J22 and J23 of two bands, 2 pins can be set,
1 pin and 2 pins of terminal J22 are connected respectively the both ends of resistance R48, and 1 pin of terminal J23 and 2 pins respectively correspond
It the both ends for connecting resistance R49 can be with short-circuit resistance R48, when the connecting pin on terminal J23 when connecting end cap on terminal J22
It, can be with short-circuit resistance R49 when cap.
In the present embodiment, as shown in figure 8, control circuit for heater includes solid-state relay, diode D12, diode
D13, resistance R46 and resistance R49；Diode D12 and diode D13 is Transient Suppression Diode；Solid-state in the present embodiment
AQZ102 chip can be used in relay.
The input negative terminal of solid-state relay by the output interface Y2 of resistance R46 connection PLC AM access module, resistance R46 with
One end connection diode D13 anode of the output interface connection of PLC AM access module, diode D13 cathode connect power supply power supply list
The input anode of member, solid-state relay connects power supply power supply unit；
The output plus terminal of solid-state relay connects power supply power supply unit；The output negative terminal of solid-state relay connects diode
The cathode of D12, the plus earth of diode D12 constitute the end J, and the output negative terminal of solid-state relay constitutes the end K；The heater control
Circuit processed connects external heater with the end K by the end J, to control the control of external heater.
In the present embodiment, as shown in figure 8, being directed to control circuit for heater, a band 4 can be installed on circuit boards
1 pin and 2 pins of the terminal J18 of a pin, terminal J18 are all connected with the end K of control circuit for heater, 3 pins of terminal J18
The end J of control circuit for heater is all connected with 4 pins.
In the present embodiment, as shown in Figure 1, power supply power supply unit includes protecting electricity for connecting the access of external power supply
Road, 24V power circuit, main power source rail control circuit, positive and negative 12V power circuit, 5V power circuit, 3.3V power circuit and 3V
Battery circuit.Wherein, the output end of access protection circuit connects 24V power circuit, and the electricity of 24V is generated by 24V power circuit
Pressure；The output end of access protection circuit connects main power source rail control circuit, exports main power source by main power source rail control circuit；Institute
The output interface for stating the control terminal connection PLC AM access module of main power source rail control circuit, passes through the output interface of PLC AM access module
Connect the output end of external PLC；The main power source output end of main power source rail control circuit is separately connected positive and negative 12V power circuit and 5V
The input terminal of power circuit is generated the DC power supply of positive and negative 12V by positive and negative 12V power circuit, is generated by 5V power circuit
The voltage of 5V；The input terminal of the output end connection 3.3V power circuit of 5V power circuit, generates 3.3V by 3.3V power circuit
Voltage.
As illustrated in fig. 9, access protection circuit includes protector F1 and diode D5 in the present embodiment, and diode D5 is wink
State inhibits diode, and the one end protector F1 constitutes the end L, and the other end is connected with diode D5 cathode, and the anode of diode D5 constitutes M
It holds and is grounded, capacitor C46 is connected between the cathode and anode of diode D5, access protection circuit is distinguished by the end L and the end M
It is correspondingly connected with the anode and cathode of external 12V DC power supply；The cathode and anode of diode D5, which respectively corresponds, constitutes access guarantor
The power supply output plus terminal and negative terminal of protection circuit.
As illustrated in fig. 9,24V power circuit includes power module VRB1224ZP, power module in the present embodiment
The Vin pin and GND pin of VRB1224ZP is connected respectively the power supply output plus terminal and negative terminal of access protection circuit；Power supply
+ V0 the pin of module VRB1224ZP is grounded by capacitor C47, while+V0 the pin of power module VRB1224ZP constitutes N-terminal,
The 0V pin of power module VRB1224ZP is grounded；24V power circuit exports the voltage of 24V by N-terminal.In the present embodiment,
The power voltage supply that 24V power circuit exports gives external PLC and liquid leakage measuring circuit.
As shown in figure 9b, main power source rail control circuit includes solid-state relay, diode D6, diode D7 in the present embodiment
It is Transient Suppression Diode with resistance R38, the diode D6 and diode D7, the input negative terminal of solid-state relay passes through resistance
R38 connects the output interface of PLC AM access module, and the output end of external PLC is connected by the output interface of PLC AM access module；Resistance
The anode of one end that the output interface of R38 with PLC AM access module connects connection diode D6, the cathode of diode D3, solid-state after
The input anode of electric appliance and the output plus terminal of solid-state relay are all connected with the power supply output plus terminal of access protection circuit；Main power source rail
The cathode of the output plus terminal connection diode D7 of control circuit, the plus earth of diode D7；Main power source rail control circuit it is defeated
Anode constitutes the main power source output end of main power source rail control circuit out.In the present embodiment, the V of temperature measuring circuit XTR105
Latter linked+pin differential concatenation diode is power supply power supply unit main power source output end, defeated by main power source rail control circuit
Voltage out is powered.In the present embodiment, stepper motor drive control circuit and the solid-state of control circuit for heater after
What the input anode of electric appliance was all connected with is the main power source output end of power supply power supply unit.
As is shown in fig. 9 c, positive and negative 12V power circuit includes power module WRA1212S and inductance L1 in the present embodiment；Wherein
The main power source output end of one end connection main power source rail control circuit of inductance L1, and be grounded by capacitor C42, inductance L1's is another
One end connects the VIN pin of power module WRA1212S, and the VIN pin of power module WRA1212S is grounded by capacitor C43, electricity
The GND pin of source module WRA1212S is grounded；The Ctrl pin floating of power module WRA1212S, power module WRA1212S's
+ V0 pin passes through capacitor C44 connection 0V pin by capacitor C41 connection 0V the pin ,-V0 pin of power module WRA1212S,
The 0V pin of WRA1212S is grounded；The electricity that positive and negative 12V power circuit passes through the+V0 pin output+12V of power module WRA1212S
Pressure；The voltage that positive and negative 12V power circuit passes through the-V0 pin output -12V of power module WRA1212S.In the present embodiment, just
+ 12V the voltage of negative 12V power circuit output can supply consolidating for stepper motor drive control circuit and control circuit for heater
The positive and negative 12V voltage of the output plus terminal of state relay, positive and negative 12V power circuit output can supply electricity to luminous intensity measurement circuit.
As shown in figure 9b, 5V power circuit includes power supply chip MP1469, resistance R39, resistance R40, electricity in the present embodiment
Hinder R41, resistance R42, resistance R43 and inductance L3；The IN pin of the power supply chip MP1469 is drawn by resistance R40 connection EN
Foot, the IN pin of power supply chip MP1469 pass through capacitor C48 and capacitor C49 ground connection respectively；The IN pin of power supply chip MP1469
Connect the main power source output end of main power source rail control circuit, the GND pin ground connection of power supply chip MP1469, power supply chip MP1469
BST pin serial connection resistance R39 and capacitor C52 after connect SW pin, the SW pin connection inductance L3 of power supply chip MP1469
The other end of one end, inductance L3 connects FB pin with resistance R41 by concatenated resistance R42, and resistance R42 is connected with resistance R41
One end be grounded by resistance R43, the other end of inductance L3 is grounded by capacitor C54, and 5V power circuit is another by inductance L3
The voltage of one end output 5V.The 5V voltage of 5V power circuit output in the present embodiment can supply electricity to RS-485 communication module
Deng.
As shown in figure 9d, 3.3V power circuit includes power supply chip TPS73733, the power supply chip in the present embodiment
The IN pin of TPS73733 connects EN pin, and connects with 5V power circuit output end, while power supply chip TPS73733
IN pin is grounded by capacitor C51, the GND pin ground connection of power supply chip TPS73733；The OUT pin of power supply chip TPS73733
It is grounded by capacitor C52, the NR pin of power supply chip TPS73733 is grounded by capacitor C53；3.3V power circuit is drawn by OUT
The voltage of foot output 3.3V.The 3.3V voltage of 3.3V power circuit output in the present embodiment mainly supplies electricity to main control chip.
In the present embodiment, it is directed to power supply power supply unit, the terminal of 2 pins of 1 band is installed on circuit boards
The terminal J11 of 4 pins of J10 and band.Wherein two pins of terminal J10 are separately connected the end L and the M of access protection circuit
End, in actual use, external power supply pass through corresponding plug-in connection J10.1 pin of terminal J11 connects N-terminal, and 2 draw
Foot ground connection, 3 pins carry out the earthing of casing, and 4 and 5 pins are separately connected the A foot of SN65HVD1781 chip in RS-485 communication module
With B foot, in actual use, external PLC passes through corresponding plug-in connection J11, and external PLC is obtained electric by terminal J11
While source power supply unit is powered, it can be realized and be communicated by RS-485 communication module and main control chip, so that the present embodiment instrument
Device telemetry circuit and the line of outside PLC are simpler.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiments of the present invention is not by above-mentioned
The limitation of embodiment, it is made under other any spiritual essence and principles without departing from the utility model to change, modify, replacing
In generation, simplifies combination, should be equivalent substitute mode, is included within the protection scope of the utility model.
Claims (10)
1. a kind of dedicated instrument telemetry circuit of original position nutrient salt analyzer, which is characterized in that including power supply power supply unit, master control
Chip circuit, analog to digital conversion circuit, the PLC AM access module for connecting external PLC, temperature measuring circuit, luminous intensity measurement electricity
Road, photoelectric sensor measuring circuit, liquid leakage measuring circuit and stepper motor drive control circuit；
The main control chip circuit connects temperature measuring circuit and luminous intensity measurement circuit by analog to digital conversion circuit；The master control
Chip circuit connects external PLC；
The PLC AM access module include each input interface for being connect with each data input pin of external PLC and for it is outer
Each output interface of each data output end connection of portion PLC；Wherein PLC AM access module connects photoelectric sensor by input interface and surveys
Measure module and liquid leakage measuring circuit；PLC AM access module is connected with control circuit for heater and stepping electricity by output interface
Machine drive control circuit；
The power supply power supply unit connection master chip circuit, temperature measuring circuit, photoelectric sensor measurement module, liquid leakage are surveyed
Measure circuit, stepper motor drive control circuit and heating control circuit.
2. the dedicated instrument telemetry circuit of original position nutrient salt analyzer according to claim 1, which is characterized in that the temperature
Spend measuring circuit, luminous intensity measurement circuit, photoelectric sensor measuring circuit, liquid leakage measuring circuit and stepper motor driving control
The number of circuit processed is one or more；
It include for the light intensity sensor light source with external nutrient salt analyzer in situ in the output interface of PLC AM access module
First output interface of connection, external PLC are passed by the luminous intensity of the external nutrient salt analyzer in situ of the first output interface connection
Sensor light source.
3. the dedicated instrument telemetry circuit of original position nutrient salt analyzer according to claim 1, which is characterized in that the temperature
Spending measuring circuit includes current signal transmitter XTR105 and triode Q1；Connection sliding becomes between two RG pins of XTR105
Device RL1 is hindered, the VIN+ pin and IR2 pin of XTR105 connects and composes the port A, IR2 pin and VIN- the pin difference of XTR105
It connects one end of slide rheostat RL2, the sliding end of slide rheostat RL2 and the IR2 pin of XTR105 and VIN- pin connects,
The other end of resistance RL2 constitutes the port B, and the IRET pin of XTR105 passes through the port resistance R17 connection B, is parallel on resistance R17
Capacitor C31；The VLIN pin of XTR105 passes through the port resistance R16 connection A；The temperature measuring circuit passes through the port A and the port B
External temperature sensor is connected, the signal of external temperature sensor output is got；
The B pin and E pin of XTR105 is separately connected base stage and the pole C of triode Q1；The collector of triode Q1 connects
The V+ pin of XTR105；Power supply power supply unit is connected after the V+ pin differential concatenation diode of XTR105, passes through power supply power supply list
Member gets DC supply input；The V+ pin of XTR105 passes through the I/O pin of capacitance connection XTR105, and the I/O pin of XTR105 connects
Connect the input end of analog signal of analog to digital conversion circuit.
4. the dedicated instrument telemetry circuit of original position nutrient salt analyzer according to claim 1, which is characterized in that the light
Ionization meter circuit includes resistance R32 and resistance R35, and the one end the resistance R32 constitutes C port, after other end series resistance R35
Ground connection, the input end of analog signal for one end connection analog to digital conversion circuit that resistance R32 is connected with resistance R35；Resistance R35 is parallel with
Capacitor C38；The luminous intensity measurement circuit connects the letter of the light intensity sensor of external nutrient salt analyzer in situ by C port
Number output end.
5. the dedicated instrument telemetry circuit of original position nutrient salt analyzer according to claim 1, which is characterized in that the liquid
Body leakage measuring instrumentation circuit includes triode Q3, triode Q5, resistance R20 in parallel and resistance R22, resistance R24 and electricity in parallel
Hinder the electronics R28 and resistance R30 of R26 and parallel connection；
The base stage of triode Q3 constitutes the port D, one end composition port E of resistance R20 and resistance R22 parallel connection, resistance R20 and resistance
The other end of R22 parallel connection connects power supply power supply unit, gets DC supply input by power supply power supply unit；The hair of triode Q3
Emitter grounding is connected with capacitor C34 between the emitter and base stage of triode Q3；One end of resistance R24 and resistance R26 parallel connection connects
Connect triode Q3 collector, another termination power supply power supply unit of resistance R24 and resistance R26 parallel connection；
The collector of the base stage connecting triode Q3 of triode Q5；The emitter of triode Q5 is grounded, the emitter of triode Q5
Capacitor C36 is connected between base stage；One end connecting triode Q5 collector of resistance R28 and resistance R30 parallel connection, resistance R28
With another termination power supply power supply unit of resistance R30 parallel connection；The input of the collector connection PLC AM access module of triode Q5 connects
Mouthful, the input terminal of external PLC is connected by the input interface of PLC AM access module；
Liquid leakage measuring circuit connects the signal output end of external water droplet sensor by the port D with the port E.
6. the dedicated instrument telemetry circuit of original position nutrient salt analyzer according to claim 1, which is characterized in that photoelectric transfer
Sensor measurement module includes first interface, second interface, third interface and the 4th interface；Wherein first interface connects power supply power supply
Unit gets DC supply input by power supply power supply unit；Second interface ground connection；Third interface and the 4th interface are separately connected
The input interface of PLC AM access module；Photoelectric sensor measurement module connects external photoelectric transfer with second interface by first interface
The power end of sensor, it is defeated that the power end of external photoelectric sensor by first interface and second interface gets power supply power supply unit
Direct current out；Photoelectric sensor measurement module connects the signal output of photoelectric sensor by third interface and the 4th interface
End, external PLC get the signal of photoelectric sensor output by third interface and the 4th interface.
7. the dedicated instrument telemetry circuit of original position nutrient salt analyzer according to claim 1, which is characterized in that the step
It include solid-state relay, diode D14, diode D15, resistance R47, resistance R48 and resistance into motor driving controling circuit
R49；The diode D14 and diode D15 is Transient Suppression Diode；
The input negative terminal of the solid-state relay passes through the output interface of resistance R47 connection PLC AM access module, resistance R47 and PLC
One end connection diode D15 anode of the output interface connection of AM access module, diode D15 cathode connect power supply power supply unit；
The input anode of solid-state relay connects power supply power supply unit；The output plus terminal of solid-state relay connects power supply power supply unit；Gu
The cathode of the output negative terminal connection diode D14 of state relay, the plus earth of diode D14 constitute the end F, solid-state relay
It exports negative terminal and constitutes the end G；The output interface of one end connection PLC AM access module of resistance R48, the other end of resistance R48 constitute H
End；The output interface of one end connection PLC AM access module of resistance R49, the other end of resistance R49 constitute the end I；
Stepper motor drive control circuit be connected respectively by the end F, the end G, the end H and the end I f the cathode of external motor, anode,
Positive and negative rotation control terminal and start end.
8. the dedicated instrument telemetry circuit of original position nutrient salt analyzer according to claim 1, which is characterized in that described to add
Hot device control circuit includes solid-state relay, diode D12, diode D13, resistance R46 and resistance R49；The diode D12
It is Transient Suppression Diode with diode D13；
The input negative terminal of the solid-state relay passes through the output interface of resistance R46 connection PLC AM access module, resistance R46 and PLC
One end connection diode D13 anode of the output interface connection of AM access module, diode D13 cathode connect power supply power supply unit,
The input anode of solid-state relay connects power supply power supply unit；
The DC power output end of the output plus terminal connection power supply power supply unit of solid-state relay；The output negative terminal of solid-state relay
The cathode of diode D12 is connected, the plus earth of diode D12 constitutes the end J, and the output negative terminal of solid-state relay constitutes the end K；Institute
It states control circuit for heater and external heater is connected with the end K by the end J, to control the control of external heater.
9. the dedicated instrument telemetry circuit of original position nutrient salt analyzer according to claim 1, which is characterized in that the electricity
Source power supply unit includes protecting circuit, 24V power circuit, main power source rail control circuit, just for connecting the access of external power supply
Negative 12V power circuit, 5V power circuit, 3.3V power circuit and 3V battery circuit；
The output end of the access protection circuit connects 24V power circuit, and the voltage of 24V is generated by 24V power circuit；
The output end of the access protection circuit connects main power source rail control circuit, exports main electricity by main power source rail control circuit
Source；The output interface of the control terminal connection PLC AM access module of the main power source rail control circuit, passes through the defeated of PLC AM access module
Outgoing interface connects the output end of external PLC；
The main power source output end of the main power source rail control circuit is separately connected the defeated of positive and negative 12V power circuit and 5V power circuit
Enter end, the DC power supply of positive and negative 12V is generated by positive and negative 12V power circuit, the voltage of 5V is generated by 5V power circuit；
The input terminal of the output end connection 3.3V power circuit of the 5V power circuit, generates 3.3V's by 3.3V power circuit
Voltage.
10. the dedicated instrument telemetry circuit of original position nutrient salt analyzer according to claim 9, which is characterized in that described
Access protection circuit includes protector F1 and diode D5, the diode D5 are Transient Suppression Diode, the one end protector F1
The end L is constituted, the other end is connected with diode D5 cathode, and the anode of diode D5 constitutes the end M and is grounded, the cathode of diode D5
Capacitor C46 is connected between anode, access protection circuit is connected respectively external 12V DC power supply by the end L and the end M
Anode and cathode；The cathode of diode D5 and anode respectively correspond the power supply output plus terminal for constituting access protection circuit and bear
End；
The 24V power circuit includes power module VRB1224ZP, the Vin pin and GND pin of power module VRB1224ZP
It is connected respectively the power supply output plus terminal and negative terminal of access protection circuit；+ V0 the pin of power module VRB1224ZP passes through electricity
Hold C47 ground connection, the 0V pin ground connection of power module VRB1224ZP；24V power circuit is exported by power module VRB1224ZP
The voltage of 24V；
The main power source rail control circuit includes solid-state relay, diode D6, diode D7 and resistance R38, the diode
D6 and diode D7 is Transient Suppression Diode, and the input negative terminal of solid-state relay connects the defeated of PLC AM access module by resistance R38
Outgoing interface connects the output end of external PLC by the output interface of PLC AM access module；Resistance R38 and PLC AM access module it is defeated
The anode of one end connection diode D6 of outgoing interface connection, the cathode of diode D3, the input anode of solid-state relay and solid-state
The output plus terminal of relay is all connected with the power supply output plus terminal of access protection circuit；The output plus terminal of main power source rail control circuit connects
Connect the cathode of diode D7, the plus earth of diode D7；The output plus terminal of main power source rail control circuit constitutes main power source rail
The main power source output end of control circuit；
The positive and negative 12V power circuit includes power module WRA1212S and inductance L1；Wherein one end of inductance L1 connects main electricity
The main power source output end of source rail control circuit, and be grounded by capacitor C42, the other end of inductance L1 connects power module
The VIN pin of the VIN pin of WRA1212S, power module WRA1212S is grounded by capacitor C43, power module WRA1212S's
GND pin ground connection；+ V0 the pin of the Ctrl pin floating of power module WRA1212S, power module WRA1212S passes through capacitor
- V0 the pin of C41 connection 0V pin, power module WRA1212S passes through capacitor C44 connection 0V pin, the 0V pin of WRA1212S
Ground connection；The voltage that positive and negative 12V power circuit passes through the+V0 pin output+12V of power module WRA1212S；Positive and negative 12V power supply electricity
The voltage that road passes through the-V0 pin output -12V of power module WRA1212S；
The 5V power circuit includes power supply chip MP1469, resistance R39, resistance R40, resistance R41, resistance R42, resistance R43
With inductance L3；The IN pin of the power supply chip MP1469 is drawn by resistance R40 connection EN pin, the IN of power supply chip MP1469
Foot passes through capacitor C48 and capacitor C49 ground connection respectively；The master of the IN pin connection main power source rail control circuit of power supply chip MP1469
Power output end, the GND pin ground connection of power supply chip MP1469, the BST pin serial connection resistance R39 and electricity of power supply chip MP1469
SW pin, one end of the SW pin connection inductance L3 of power supply chip MP1469 are connected after holding C52, the other end of inductance L3 passes through string
The resistance R42 and resistance R41 of connection connect FB pin, and one end that resistance R42 is connected with resistance R41 is grounded by resistance R43, inductance
The other end of L3 is grounded by capacitor C54, and 5V power circuit exports the voltage of 5V by the other end of inductance L3；
The 3.3V power circuit includes power supply chip TPS73733, and the IN pin connection EN of the power supply chip TPS73733 draws
Foot, and connected with 5V power circuit output end, while the IN pin of power supply chip TPS73733 is grounded by capacitor C51, electricity
The GND pin of source chip TPS73733 is grounded；The OUT pin of power supply chip TPS73733 is grounded by capacitor C52, power supply chip
The NR pin of TPS73733 is grounded by capacitor C53；3.3V power circuit exports the voltage of 3.3V by OUT pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920006939.7U CN209182685U (en) | 2019-01-03 | 2019-01-03 | A kind of dedicated instrument telemetry circuit of original position nutrient salt analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920006939.7U CN209182685U (en) | 2019-01-03 | 2019-01-03 | A kind of dedicated instrument telemetry circuit of original position nutrient salt analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209182685U true CN209182685U (en) | 2019-07-30 |
Family
ID=67378519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920006939.7U Active CN209182685U (en) | 2019-01-03 | 2019-01-03 | A kind of dedicated instrument telemetry circuit of original position nutrient salt analyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209182685U (en) |
-
2019
- 2019-01-03 CN CN201920006939.7U patent/CN209182685U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105960056A (en) | A power source unit and a related lighting system | |
| CN201096867Y (en) | Multi-function tester for measuring semiconductor silicon material P/N and resistance rate | |
| CN106679654A (en) | Magnetic navigation sensor for AGV | |
| CN209182685U (en) | A kind of dedicated instrument telemetry circuit of original position nutrient salt analyzer | |
| CN109298324A (en) | The close switch automatic checkout system of one kind | |
| CN204314449U (en) | A kind of auto testing instrument being applied to intelligent electric meter production line | |
| CN205809633U (en) | Intelligent touch switch | |
| KR101266262B1 (en) | Connector terminal block | |
| CN201035055Y (en) | Duct spreading device of LRC tester | |
| CN203965551U (en) | A kind of multichannel transmitters sense device | |
| US4214200A (en) | Light-emissive electrical measurement apparatus with floating inputs | |
| CN102981134B (en) | Intelligent display device tester of switch cabinet | |
| CN207215278U (en) | A kind of rotation formula vibration acquisition system and its rotation formula censor key | |
| CN216349199U (en) | Intelligent temperature transmitter and sensor signal measuring device | |
| CN203118314U (en) | Multimeter experimental instrument | |
| CN203134173U (en) | Automobile sensor signal simulation training device | |
| CN211477437U (en) | Multi-path low-power-consumption temperature acquisition circuit | |
| CN207688813U (en) | A kind of conditioning amplifying circuit and use its length detecting and controlling system | |
| CN208420962U (en) | A kind of signal deteching circuit and motor speed measuring system | |
| CN209229941U (en) | A kind of server environment detection device | |
| CN101109968A (en) | Programmable controller for temperature and humidity | |
| CN212274203U (en) | Hot standby type safe fresh air controller | |
| CN2234086Y (en) | Luminous electronic thermometer | |
| CN220475783U (en) | Optical module extinction ratio debugging box with TTL code source | |
| CN109618462A (en) | A kind of illumination control apparatus and system based on wire communication |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |