CN208459825U

CN208459825U - A kind of sensor interface circuitry for grain feelings detection extension set

Info

Publication number: CN208459825U
Application number: CN201821223843.8U
Authority: CN
Inventors: 刘文敬; 朱鹏飞; 王志民
Original assignee: Source Zhengzhou Powerise Control Co Ltd
Current assignee: Zhengzhou Banghai Intelligent Technology Co.,Ltd.; ZHENGZHOU YUANCHUANG INTELLIGENT CONTROL Co.,Ltd.
Priority date: 2018-08-01
Filing date: 2018-08-01
Publication date: 2019-02-01
Anticipated expiration: 2028-08-01

Abstract

The utility model relates to a kind of sensor interface circuitries for grain feelings detection extension set, technical solution is, data processing module and sensor interface module including circuit board and setting on circuit boards, the data processing module includes chip U4, the sensor interface module includes 4 identical grain temperature channel data Acquisition Circuits, the corresponding 2 grain temperature data acquisition channels of each grain temperature channel data Acquisition Circuit, it includes PMOS tube U6B, U5B, U9A, U9B, triode Q3, Q6, protector T2 and protection diode D6, the utility model load capacity is strong: extension set has 8 acquisition channels altogether, each channel at most can access 120 temperature measuring points.960 temperature measuring points can be accommodated altogether, and 1 extension set can be for using between 1,2,4 or 8 Ao；Strong antijamming capability, easy to operate, communication distance is remote.

Description

A kind of sensor interface circuitry for grain feelings detection extension set

Technical field

The utility model relates to grain storage detection technique field, especially a kind of sensor for grain feelings detection extension set Interface circuit.

Background technique

For in the grain information monitoring system in grain storage industry, existing grain feelings detection extension set is in practical applications Shortcoming is as follows:

1, communication mode is inconvenient: using Node connectedness communication mode, extension set and master when common detection extension set wireless telecommunications Communication between machine must be provided with routed path, such as have A, B, tri- network nodes of C, host A, if host is wanted to obtain C point data, it is necessary to path as A-B-C is set in advance, trouble is arranged in this communication mode, once and some node Equipment breaks down, and will be unable to communicate with remaining associated equipment of its path, needs to reset wireless communication after more exchange device , flexibility is poor for diameter；

2, communication distance is limited: in the same environment, due to using network node mode to wirelessly communicate, if point Machine and host will lead to signal of communication between node and receive bad, communication abnormality apart from too far；

3, poor anti jamming capability: when PERCOM peripheral communication node sends failure or the generation interference of some node signal, transmission number According to can be abnormal；

4, environmental suitability is poor: entire power supply system only has solar panels and two kinds of battery, and solar panel cannot obtain When enough to illumination, battery capacity is again limited, and system power supply, which goes wrong, to be made entirely to detect extension set and can not work；

5, energy utilization rate is low: solar panels are generally 0.5W or so using drop offset plate, power, after long-time use by It is influenced in environment material, solar panel working efficiency reduces, and light transmittance is low, reduces to the transfer efficiency of solar energy；

6, service life is short: a factor is that the material that the solar panels of current detection extension set use is that drop offset plate uses year It is limited to 3 years, another factor is that the power supply of whole system is charged the battery by solar energy, and then battery is supplied to remaining equipment Electricity shorten the service life of battery during battery can be often in charging, electric discharge in the extension set course of work；

7, power consumption is high: grain inspection system does not need to power to grain temperature sensor always, only in normal use process System can just power when needing to acquire grain temperature, so substantially 30 points of time of every grain feelings detection extension set real work Clock is enough, and such 98% time is in fact all in off working state.Existing grain feelings testing product is to be always maintained at system electricity Source power supply, which results in the significant wastage of the energy, power consumption is also relatively high.

Therefore, the improvement and innovation of grain feelings detection extension set are imperative.

Utility model content

For above situation, for the defect for overcoming the prior art, the purpose of the utility model is just to provide a kind of operation letter It is single, load capacity is strong, the strong antijamming capability sensor interface circuitry for grain feelings detection extension set.

The technical solution that the utility model solves is:

A kind of sensor interface circuitry for grain feelings detection extension set, the data including circuit board and setting on circuit boards Processing module and sensor interface module, the data processing module include chip U4, and 1 foot of chip U4 is with capacitor C13's One end is connected, and end is 3.3V power input (with the total end of capacitor C13 and the 3.3V power output end of intelligent power supply module altogether VCC3.3V is connected), the other end of capacitor C13 ground connection, the one of one end of the 7 feet difference connecting resistance R14 of chip U4 and capacitor C8 End, the other end ground connection of capacitor C8, the other end of resistance R14 are 3.3V power input (the 3.3V electricity with intelligent power supply module Source output terminal VCC3.3V be connected), 13 feet of chip U4 respectively with 19 feet of chip U4,64 feet, 48 feet, 32 feet, capacitor C9 one End, one end of capacitor C10, capacitor C11 one end be connected with one end of capacitor C12, altogether end be 3.3V power input (with intelligence The 3.3V power output end VCC3.3V of power supply module is connected), the other end of capacitor C9 connects the other end of capacitor C10, capacitor respectively The other end of C11 and the other end of capacitor C12, end ground connection, 60 feet of chip U4 distinguish one end and the triode of connecting resistance R20 altogether The collector of Q5, resistance R20 the other end ground connection, triode Q5 emitter difference connecting resistance R23 one end and port P1 1 Foot, end is 3.3V power input (being connected with the 3.3V power output end VCC3.3V of intelligent power supply module) altogether, resistance R23's The other end connects the base stage of triode Q5 and one end of resistance R22 respectively, and the other end of resistance R22 is connected with 5 feet of port P1, end 2 feet of mouth P1 are connected with 42 feet of chip U4, and 3 feet of port P1 are connected with 43 feet of chip U4,4 ground connection of port P1, port 7 feet of P1 are connected with 49 feet of chip U4, and 8 feet of port P1 are connected with 46 feet of chip U4, and 5 feet of chip U4 connect crystal oscillator respectively One end of M2 and one end of capacitor C16, the other end of capacitor C16 are connected with one end of capacitor C17, altogether end ground connection, capacitor C17's The other end connects the other end of crystal oscillator M2 and 6 feet of chip U4 respectively；27 feet of chip U4 connect the base of triode Q9 through resistance R39 Pole, the emitter ground connection of triode Q9, collector are connected (corresponding CHPWR [8..1] end is connected) with sensor interface module, 57 feet of chip U4 connect the base stage of triode Q10, the emitter ground connection of triode Q9 through resistance R40, and collector connects with sensor Mouth mold block is connected (corresponding CHPWR [8..1] end is connected)；28 feet of chip U4 are grounded through resistance R17,31 feet, 47 feet, 63 feet, 18 feet, 12 foot earths；

The sensor interface module includes 4 identical grain temperature channel data Acquisition Circuits, each grain temperature port number According to the corresponding 2 grain temperature data acquisition channels of Acquisition Circuit comprising PMOS tube U6B, U5B, U9A, U9B, triode Q3, Q6 are protected Shield device T2 and protection diode D6, protector T2 and protection diode D6 have identical two, the source electrode difference of PMOS tube U6B Connect one end of capacitor C25, one end of capacitor C26, one end of resistance R26, the source electrode of PMOS tube U9B, one end of resistance R28, electricity Hinder one end of R16, the source electrode of PMOS tube U9A, one end of resistance R24, one end of resistance R27, resistance R11 one end and, PMOS The source electrode of pipe U6A, end is VDD power input (the VDD output port of power source for connecing working sensor power circuit), PMOS tube altogether The grid of U6B is connected with the other end of resistance R24, altogether a corresponding CHPWR [8..1] port (the respectively core of chip termination U4 44 feet, 54 feet, 27 feet, 57 feet, 61 feet, 35 feet, 39 feet, 51 feet of piece U4), the drain electrode of PMOS tube U6B meets triode Q3 respectively Collector, the other end of resistance R27, one end of resistance R19, one end of capacitor C23, first protector T2 one end and The cathode of one protection diode D6, altogether end as output end CHx_OUT (be connected with corresponding out splice going splice CHx_OUT, wherein X is 1-8, represents the output end in 8 channels) and an input terminal CHI [8..1] corresponding with chip U4 in data processing module Port (respectively 45 feet of chip U4,55 feet, 58 feet, 62 feet, 33 feet, 37 feet, 40 feet, 52 feet), which is connected, is used as input terminal, The other end of the grid connecting resistance R11 of PMOS tube U6A holds a CHH corresponding with chip U4 in data processing module altogether Port [8..1] (respectively 41 feet of chip U4,50 feet, 56 feet, 59 feet, 34 feet, 36 feet, 38 feet, 53 feet) is connected, PMOS tube The other end of the drain electrode connecting resistance R19 of U6A, the base stage of triode Q3 meet chip U4 in data processing module through resistance R32 and correspond to CHL [8..1] port (respectively 26 feet of chip U4,28 feet, 8 feet, 9 feet, 10 feet, 11 feet, 24 feet, 25 feet), three poles The emitter of pipe Q3 meets the other end of capacitor C23, the other end of capacitor C25, the other end of capacitor C26, triode Q6 respectively Emitter, one end of capacitor C24, one end of second protector T2, the other end of first protector T2, second protection two The other end of one end of pole pipe D6 and first protection diode D6, end is grounded altogether, the grid connecting resistance R16's of PMOS tube U9A The other end, altogether hold a CHH [8..1] corresponding with chip U4 in data processing module port (respectively 41 feet of chip U4, 50 feet, 56 feet, 59 feet, 34 feet, 36 feet, 38 feet, 53 feet) it is connected, one end of the drain electrode connecting resistance R21 of PMOS tube U9A, resistance The other end of R21 connects the drain electrode of PMOS tube U9B, the other end of resistance R28, the other end of capacitor C24, second protector respectively The other end of the other end of T2 and second protection diode D6, end (is connected with corresponding output as output end CHx_OUT altogether Connector CHx_OUT, wherein x be 1-8, represent the output end in 8 channels) and input terminal it is corresponding with chip U4 in data processing module CHI [8..1] port (respectively 45 feet of a chip U4,55 feet, 58 feet, 62 feet, 33 feet, 37 feet, 40 feet, 52 feet) phase Continuous cropping is input terminal, and the other end of the grid connecting resistance R26 of PMOS tube U9B holds a CHPWR corresponding with chip U4 altogether Port [8..1] (respectively 44 feet of chip U4,54 feet, 27 feet, 57 feet, 61 feet, 35 feet, 39 feet, 51 feet) is connected, triode The base stage of Q6 through resistance R33 connect a corresponding CHL [8..1] port chip U4 in data processing module (respectively chip U4's 26 feet, 28 feet, 8 feet, 9 feet, 10 feet, 11 feet, 24 feet, 25 feet).

The utility model has technical effect beneficial below:

1, load capacity is strong: extension set has 8 acquisition channels altogether, and each channel at most can access 120 temperature measuring points.Altogether may be used To accommodate 960 temperature measuring points.1 extension set can be for using between 1,2,4 or 8 Ao；

2, strong antijamming capability: plug-in unit P4 is sensor and power switch Wiring port, and ESD protection device T6 therein is used In protection internal circuit from the interference of electrostatic.Plug-in unit P5 is grain temperature channel sensor connectivity port, and TVS protective device T4 is used for Subordinate machine system power supply is protected not interfered by extraneous such as thunder and lightning；

3, easy to operate: only to need for grain temperature cable to be articulated on main line, be acquired by main line grain temperature corresponding with extension set Channel connection, host are communicated with extension set, are obtained extension set by wireless transmission and are collected the wet information of grain temperature information and storehouse temperature storehouse；

4, communication distance is remote: using wireless communication technique by wireless communication unit based on ad hoc network function with it is corresponding Measurement and control host computer establishes wireless telecommunications convenient for networking.It is more convenient without manually carrying out complicated path setting and maintenance；

Detailed description of the invention

Fig. 1-7 is the circuit diagram of the data processing module of the utility model.

Fig. 8 is the utility model sensor interface module grain temperature channel data Acquisition Circuit schematic diagram.

Fig. 9 is that the utility model sensor interface module grain temperature channel integrates connection terminal module circuit diagram.

Figure 10 is the circuit diagram of the utility model communication module.

Figure 11 is the circuit frame schematic diagram of the utility model use state.

Figure 12-14 is the circuit diagram of the utility model intelligent power supply module；

Wherein Figure 12 is lithium battery charging management circuit schematic diagram；

Figure 13 power supply automatic switchover circuit schematic diagram:

Figure 14 working sensor power circuit principle figure.

Figure 15-17 is the utility model supply voltage detection module circuit diagram:

Wherein Figure 15 is external power supply voltage detecting circuit schematic diagram；

Figure 16 is booster circuit supply voltage detection circuit schematic diagram；

Figure 17 is booster circuit output voltage detecting circuit schematic diagram.

Figure 18 is the integral module schematic diagram of the utility model use state.

Specific embodiment

Specific embodiment of the present utility model is described in further detail below in conjunction with attached drawing.

It is provided by Fig. 1-18, the utility model includes circuit board and setting data processing module on circuit boards and sensing Device interface module, the data processing module include chip U4, and 1 foot of chip U4 is connected with one end of capacitor C13, and end is altogether 3.3V power input (is connected) with the total end of capacitor C13 with the 3.3V power output end VCC3.3V of intelligent power supply module, capacitor The other end of C13 is grounded, one end of the 7 feet difference connecting resistance R14 of chip U4 and one end of capacitor C8, another termination of capacitor C8 Ground, the other end of resistance R14 are 3.3V power input (the 3.3V power output end VCC3.3V phase with intelligent power supply module Even), 13 feet of chip U4 respectively with 19 feet of chip U4,64 feet, 48 feet, 32 feet, one end of capacitor C9, capacitor C10 one end, One end of capacitor C11 is connected with one end of capacitor C12, and end is 3.3V power input (the 3.3V electricity with intelligent power supply module altogether Source output terminal VCC3.3V is connected), the other end of capacitor C9 connects the other end and electricity of the other end of capacitor C10, capacitor C11 respectively Hold the other end of C12, altogether end ground connection, one end of the 60 feet difference connecting resistance R20 of chip U4 and the collector of triode Q5, resistance The other end of R20 is grounded, and one end of the emitter difference connecting resistance R23 of triode Q5 and 1 foot of port P1, end is 3.3V electricity altogether Source input terminal (is connected) with the 3.3V power output end VCC3.3V of intelligent power supply module, and the other end of resistance R23 connects three poles respectively The base stage of pipe Q5 and one end of resistance R22, the other end of resistance R22 are connected with 5 feet of port P1,2 feet and chip of port P1 42 feet of U4 are connected, and 3 feet of port P1 are connected with 43 feet of chip U4,4 ground connection of port P1,7 feet and chip U4 of port P1 49 feet be connected, 8 feet of port P1 are connected with 46 feet of chip U4, and 5 feet of chip U4 connect one end and the capacitor of crystal oscillator M2 respectively The other end of one end of C16, capacitor C16 is connected with one end of capacitor C17, and end ground connection, the other end of capacitor C17 connect crystalline substance respectively altogether Shake the other end of M2 and 6 feet of chip U4；27 feet of chip U4 connect the base stage of triode Q9, the hair of triode Q9 through resistance R39 Emitter grounding, collector are connected (corresponding CHPWR [8..1] end is connected) with sensor interface module, and 57 feet of chip U4 are through electricity Resistance R40 connects the base stage of triode Q10, and the emitter ground connection of triode Q9, collector is connected (corresponding with sensor interface module The end CHPWR [8..1] is connected)；28 feet of chip U4 are grounded through resistance R17, and 31 feet, 47 feet, 63 feet, 18 feet, 12 feet simultaneously couple Ground；

As shown in figs. 1-7, it is 32 high-performance Cortex-M3 that data processing module, which is contained including chip U4, chip U4, The processor of kernel, subordinate machine system working power are all connected in the VCC output port of power source of intelligent power supply module, are chip U4 (data processor MCU), which is provided, works normally power supply；Electricity in the port VDDEN (14 foot) the control intelligent power supply module of chip U4 Source connected state, U2_TXD (16 foot), U2_RXD (17 foot), 485_RE (20 foot) and 485_DE (15 foot) four ends of chip U4 The function of mouth is respectively data transmission, data receiver, reception is all-round and transmission is enabled, this four ports are connected to communication module RS485 telecommunication circuit, for being communicated with storehouse temperature storehouse wet sensor.ADO (21 foot), AD1 (22 foot) and the AD2 (23 foot) of chip U4 Port is that subordinate machine system supply voltage detects port, these three ports are connected to supply voltage detection module, and wherein the port ADO is examined Survey external power supply supply voltage, AD1 Port detecting booster circuit supply voltage, AD2 Port detecting booster circuit output voltage, core The OK (2 foot) of piece U4 and (3 foot) port CH are that lithium battery charged state detects port, and wherein the port OK is that battery is full of signal, The port CH is battery just in charging signals；The U3_TXD (29 foot) of chip U4 and U3_RXD (30 foot) port are connected to communication module Wireless communication port, function be respectively data send and data receiver, chip U4 by the two ports and wireless communication Circuit communication, for receiving order that measurement and control host computer is sent or sending collected data to measurement and control host computer.CHI [8..1] is right 8 passways of extension set (45 feet, 55 feet, 58 feet, 62 feet, 33 feet, 37 feet, 40 feet, 52 feet of corresponding chip U4) are answered, for detecting The grain temperature sensor data connected on each channel.The power supply port in the corresponding each channel CHPWR [8..1], is used to logical Road detection power supply, CHL [8..1] (26 feet, 28 feet, 8 feet, 9 feet, 10 feet, 11 feet, 24 feet, 25 feet of corresponding chip U4) are used to control Output end CH_OUT processed is low level, CHH [8..1] (41 feet, 50 feet, 56 feet, 59 feet, 34 feet, 36 feet, 38 of corresponding chip U4 Foot, 53 feet) it is used to control output end CH_OUT as high level, input terminal CHI [8..1] is directly connected to output end CH_OUT, makes it It is consistent, as shown in figure 5, providing the circuit diagram of the grain temperature channel data acquisition in 2 channels.

Resistance R14 and capacitor C8 forms electrification reset circuit, and in powered on moment, capacitor C8 both end voltage is 0V, resistance R14 Both end voltage is 3.3V, i.e., the RST pin of chip U4 (7 foot) is that low level chip U4 is in reset state, as the time prolongs Late, electric current charges to capacitor C8 through resistance R14, and charge increases in capacitor C8, and both end voltage is also gradually increasing, when the both ends capacitor C8 When voltage rises to 2V or more, chip U4 reset terminates, into starting state；The power supply of grain temperature sensor channel passes through control connection To the port chip U4 corresponding CHPWR [8..1], (1-8 totally 8 access ports, respectively correspond 44 feet, 54 feet, 27 of chip U4 Foot, 57 feet, 61 feet, 35 feet, 39 feet, 51 feet), make corresponding triode ON or cut-off, provides power supply for channel.

The end VBAT (1 foot) of chip U4 and capacitor C13 form real-time clock power circuit, operate normally real-time clock. Data processing module is communicated by RS485 with storehouse temperature storehouse wet sensor, the life sent using wireless communication receiver measurement and control host computer It enables or sends collected data to measurement and control host computer, detect subordinate machine system each section supply voltage, control 8 sensor passages Working condition is powered channel, data processing；Resistance R39, triode Q9 and resistance R40, triode Q10 are respectively constituted The level shifting circuit of sensor passage, data processing module control sensor passage power work state as needed.

To guarantee using effect, the sensor interface module further includes integrated wiring terminal module, integrated wiring terminal Module includes sensor and power switch port P4,8 access port P5,1 foot and 2 feet of sensor and power switch port P4 It is that (1 foot is connected 2 feet and sensor energization input with the 3.7V lithium battery power supply output end in lithium battery charging management circuit The drain electrode of PMOS tube U1B, which is connected, in working power circuit is used as probe power feeder ear)；3 feet are respectively with ESD protection device T6's One end is connected with 1 foot of 8 access port P5, and end is that (the VDD power supply for connecing working sensor power circuit is defeated for power input altogether Exit port), 4 feet, 5 feet of sensor and power switch port P4 are connected with communication module respectively, sensor and power switch end 6 feet of mouth P4 connect the other end of ESD protection device T6 and 2 feet of 8 access port P5 respectively, altogether end ground connection, 8 access port P5 3-10 foot output end CHx_OUT corresponding with 4 grain temperature channel data Acquisition Circuits (is connected with corresponding out splice going splice respectively CHx_OUT, wherein x is 1-8, represents the output end in 8 channels) it is connected.

The protector T2 model PESD5V0L2BT；

The protection diode D6 model BAW56；

ESD protection device T6 is unidirectional patch TVS pipe；

As shown in figure 8, the grain temperature channel data Acquisition Circuit schematic diagram of 2 grain temperature data acquisition channels is provided, wherein The port CHPWR [8..1] is respectively CH1_PWR and CH2_PWR, respectively corresponds 27 feet and 35 feet of chip U4；The end CHI [8..1] Mouth is respectively CH1_I and CH2_I, respectively corresponds the port CHI1 and the port CHI2 (33 feet and 37 feet) of chip U4；CHH[8..1] Port is respectively CH1_H and CH2_H, respectively corresponds the port CHH1 and the port CHH2 (34 feet and 36 feet) of chip U4；Connector CHx_OUT is respectively CH1_OUT and CH2_OUT, and be connected with the corresponding ports of integrated wiring terminal module (8 tunnel ends respectively The CH2 of the 3 foot CH1 and 4 feet of mouth P5)；The port CHL [8..1] is respectively CH1_L and CH2_L, respectively corresponds the CHL1 of chip U4 Port and the port CHL2 (24 feet and 25 feet)；This is the grain temperature channel Acquisition Circuit in 2 channels, other channels and this circuit phase Together；

CHx_PWR connects P metal-oxide-semiconductor U6B grid by R24 with power vd D, is connected when input low level controls PMOS tube, So that output end CHx_OUT is connected with VDD and exports high level；CHxH connects P metal-oxide-semiconductor U6A grid by R11 with power vd D, control CHx_H output low and high level processed carrys out the state of control output end CHx_OUT.CHx_I is directly connected with output end CHx_OUT, defeated The transition of outlet CHx_OUT is identical as input terminal CHx_I；It inputs CHx_L and passes through current-limiting resistance R32 and NPN triode Q3 base stage It is connected, the collector of triode Q3 is directly connected with output end CHx_OUT, and the emitter and ground of triode Q3 is shorted, by logical Know the on and off of the low and high level control triode Q3 of input terminal CHx_L, whether control output end CHx_OUT is low electricity It is flat.Output end CHx_OUT is output to port CHx_ after being connected by filter capacitor C23, protector T2 with protection diode D6 OUT；Resistance R24, PMOS tube U6B form sensor passage power supply output control circuit, and data processing module is as needed To control working sensor power supply status；Resistance R11, PMOS tube U6A resistance, R32, triode Q3 form output state control electricity Road, data processing module carry out control output end CHx_OUT state as needed.CHx_I is directly connected with output end CHx_OUT, For reading the status information of output end CHx_OUT.Output protection is formed by capacitor C23, protector T2 and protection diode D6 Device reduces static electricity on human body, external surge interference etc. and impacts to system.

As shown in figure 9, PSW+ and PSW-port are connected to intelligent power supply module in integrated wiring terminal module, it is extension set System power supply, sensor and power switch port P4 are sensor and power switch Wiring port, and ESD protection device T6 therein is used In protection internal circuit from the interference of electrostatic, 8 access port P5 are grain temperature channel sensor connectivity port, zener diode T4 (TVS protective device) is for protecting subordinate machine system power supply not interfered by extraneous such as thunder and lightning.

The communication module includes buzzer U10, RS_485 communication chip U5 and communication port P7, buzzer U10's Power input one end with capacitor C18 respectively, as power input, (and power supply automatic switchover circuit VCC power supply is defeated at end altogether Exit port is connected), the signal input part of buzzer U10 is connected with the collector of triode Q7, and the base stage of triode Q7 is through resistance R25 connects 4 feet (port BEEP) of chip U4 in data processing module, and the other end of the emitter capacity C18 of triode Q7 is connected, End ground connection, 1 foot of RS_485 communication chip U5 are connected with 17 feet of chip U4 in data processing module altogether, RS_485 communication chip 2 feet of U5 are connected with 20 feet of chip U4 in data processing module, in 3 feet and data processing module of RS_485 communication chip U5 15 feet of chip U4 are connected, and 4 feet of RS_485 communication chip U5 are connected with 16 feet of chip U4 in data processing module, RS_485 5 feet of communication chip U5 connect respectively one end of capacitor C19, one end of resistance R6, one end of protector T3, protector T5 one End, end ground connection, 6 feet of RS_485 communication chip U5 distinguish one end of connecting resistance R9 and one end of resistance R15 altogether, and resistance R9's is another One end is 3.3V power input (being connected with the 3.3V power output end VCC3.3V in power supply automatic switchover circuit), resistance R15 The other end difference connection protector T8 one end and protector T5 the other end, altogether terminate integrated wiring terminal module in sensor With 4 feet of power switch port P4, RS_485 communication chip U5 7 feet difference connecting resistance R6 the other end and resistance R18 one End, the other end of the other end difference connection protector T8 of resistance R18 and the other end of protector T3, terminate integrated wiring terminal altogether 5 feet of sensor and power switch port P4 in module, 8 feet of RS_485 communication chip U5 are connected with the other end of capacitor C19, End is 3.3V power input (being connected with the 3.3V power output end VCC3.3V in power supply automatic switchover circuit), communication ends altogether The 1 foot ground connection of mouth P7,2 feet connect one end of one end of wire jumper J1, one end of wire jumper J2 and capacitor C20 respectively, and wire jumper J1's is another End is 3.3V power input (being connected with the 3.3V power output end VCC3.3V in power supply automatic switchover circuit), wire jumper J2's The other end is 5V power input (being connected with the 5V power supply power supply output end in lithium battery charging management circuit), capacitor C20's Other end ground connection, 3 feet of communication port P7 are connected with 29 feet of chip U4 in data processing module, 4 feet of communication port P7 and 30 feet of chip U4 are connected in data processing module, the 5 feet ground connection of communication port P7.

Described protector T8, T3, T5 are unidirectional patch TVS pipe；

The buzzer U10 is the general active buzzer of 5V sold in the market；

RS_485 communication chip U5 is is sold general-purpose chip in the market.

As shown in the circuit diagram of Figure 10 communication module, communication module includes the wireless telecommunications list based on ad hoc network function Member, the wet data transmission unit of Cang Wencang and buzzer cue circuit, wireless communication unit are an independent radio communication circuits, By USART interface (WL_RXD, WL_TXD pin) in the chip U4 in subordinate machine system U3_TXD and U3_RXD connect (29,30 foot), wireless communication unit is mainly responsible for the foundation, connection and maintenance of wireless network, by being wirelessly transferred host number According to data processing module is transmitted to, the data that data processing module receives are sent to goes to be received by host in the air, realizes the inspection of grain feelings Survey the logical biography function of data of subordinate machine system and respective host；

The wet data transmission unit in storehouse temperature storehouse uses RS485 telecommunication circuit, by RS_485 communication chip U5, capacitor C19, resistance R6, R8, R15, R18, protector T3, T5, T8 composition.Chip U4 supports 32 nodes, and resistance R6 and resistance R9 are respectively upper and lower Pull-up resistor, resistance R15 and resistance R18 are respectively current-limiting resistance, and protector T3, T5, T8 are ESD protector, prevent communication bus The electrostatic that upper conduction comes damages chip U5.

Buzzer cue circuit includes buzzer U10, resistance R25, NPN triode Q7 and capacitor C18.By data processing mould The port BEEP (4 foot) of block controls triode Q7 on or off, and whether control buzzer works, wire jumper J1, J2 are carried out 3.3V power supply or 5V power supply are selected.

When the utility model is used, further includes:

Intelligent power supply module: for providing 3.3V 5V working power；Output end of powering connects data processing module, leads to Believe the energization input of module, supply voltage detection module and sensor interface module；Power source includes that external 5V power supply supplies Electricity, solar panel and lithium battery；Observing and controlling subordinate machine system is adopted in progress grain temperature sensor and storehouse temperature storehouse sensor device data When collection, data processing module can control power supply by the port VDDEN (14 foot) of chip U4 and connect, and give the wet detection in corresponding bin temperature storehouse Grain temperature detection sensor power supply in sensor and all channels, data processing module can control closing after data acquire Power path reaches energy-efficient purpose；

Supply voltage detection module: for the detection of circuit supply voltage and output voltage detection；Including external power supply voltage Detection, the detection of booster circuit supply voltage, the detection of booster circuit output voltage；Data processing module respectively with intelligent power supply mould Block, sensor interface module, communication module are connected with supply voltage detection module.

Intelligent power supply module includes that the lithium battery charging management circuit being connected respectively with data processing module, power supply are cut automatically Change circuit and working sensor power circuit.

The lithium battery charging management circuit includes charging manager U3, and 1 foot of charging manager U3 connects the sun respectively Can 2 feet of battery port P2,2 feet of 5V power port P9, one end of discharge tube T7, discharge tube T1 one end, have electrode capacitance C1 Cathode, 3 feet (grounding leg) of charging manager U3, resistance R12 one end, have electrode capacitance C6 cathode and 3.7V lithium battery end 2 feet of mouth, end ground connection, 2 feet of charging manager U3 are connected with the other end of resistance R12 altogether, and 4 feet of electric manager U3 connect respectively The cathode of diode D2, the cathode of diode D1 and the anode for having electrode capacitance C1 are held be connected with power supply out splice going splice SDC altogether, and two The anode of pole pipe D2 is connected with the other end of 1 foot of 5V power port P9, discharge tube T7 respectively, as 5V power supply power supply output end The anode of (being connected with 5V power connection VCC5V), diode D1 connects 1 foot and discharge tube T1 of solar battery port P2 respectively The other end, as solar cell for supplying power output end, 5 feet of charging manager U3 connect 8 feet of charging manager U3 respectively, have pole The anode of capacitor C6 and 1 foot of 3.7V lithium battery port, (are connected with 3.7V lithium battery to connect as 3.7V lithium battery power supply output end Head BAT+), 6 feet of charging manager U3 are connected with 2 feet of chip U4 in data processing module, 7 feet of charging manager U3 and 3 feet of chip U4 are connected in data processing module；

The power supply automatic switchover circuit includes three terminal regulator U2, PMOS tube U8A, U8B and triode Q1, Q8, three ends 2 feet (input pin) of voltage-stablizer U2 are connected to the anode of electrode capacitance C2, the source electrode of PMOS tube U8B, the cathode of diode D5, three respectively The emitter of pole pipe Q1, one end of resistance R35 and PMOS tube U8A source electrode, end (is connected with as VCC output port of power source altogether VCC power supply out splice going splice VCC), there is the cathode of electrode capacitance C2 to be connected to 1 foot of the cathode of electrode capacitance C7, three terminal regulator U2 respectively (grounding leg), one end of resistance R37, the emitter of triode Q8, resistance R34 one end, altogether end ground connection (is connected with ground joint GND), the drain electrode of PMOS tube U8B is connected with the anode of diode D5, and the grid of PMOS tube U8B connects the current collection of triode Q1 respectively The other end of pole and resistance R37, the base stage of triode Q1 connect the collector and resistance R36 of triode Q8 through resistance R38 respectively One end, the other end of the other end difference connecting resistance R35 of resistance R36 and the grid of PMOS tube U8A, the drain electrode point of PMOS tube U8A The cathode of controllable accurate source of stable pressure Q2 and one end of resistance R42 are not connect, altogether end and manager electric in lithium battery charging management circuit 4 feet of U3 are connected, and the anode of controllable accurate source of stable pressure Q2 distinguishes the other end and resistance of one end of connecting resistance R41, resistance R34 One end of R43, the other end of the other end difference connecting resistance R42 of resistance R43 and the reference pole of controllable accurate source of stable pressure Q2, resistance The other end of R41 and the base stage of triode Q8,3 feet (output pin) of three terminal regulator U2 are connected with there is the anode of electrode capacitance C7, End is as 3.3V power output end VCC3.3V altogether (connection 3.3V power supply exports VCC3.3V)；

The working sensor power circuit includes booster U7, PMOS tube U1A, U1B, and 1 foot of booster U7 connects respectively Diode D3 anode and inductance L1 one end, the cathode of diode D3 respectively one end of connecting resistance R2, having electrode capacitance C15 just Pole, one end of capacitor C21 and fuse F1 one end, the other end of resistance R2 connects 3 feet and resistance R3 of booster U7 respectively One end, the other end of resistance R3 connect respectively the anode of zener diode T4, capacitor C21 the other end, have that electrode capacitance C15's is negative Pole, one end of resistance R1, booster U7 2 feet, have electrode capacitance C3 cathode, have electrode capacitance C14 one end and triode Q4 Emitter, end ground connection, the other end of fuse F1 are connected with the cathode of zener diode T4 altogether, and end is exported as VDD power supply altogether Port (is connected with VDD power supply out splice going splice VDD), and the other end of inductance L1 connects 4 feet of booster U7 respectively, 5 feet, has electrode capacitance The test point detected as booster circuit supply voltage is held in the drain electrode of the anode of C3, one end of capacitor C14 and PMOS tube U1A altogether VEE (is connected with booster circuit supply voltage detection tabs VEE), one end, two poles of the source electrode difference connecting resistance R8 of PMOS tube U1A The cathode of pipe D7 and the source electrode of PMOS tube U1B hold the drain electrode of PMOS tube U8B, diode in VFF and power supply automatic switchover circuit altogether The total end of the anode of D5 is connected, and the other end of resistance R8 connects the grid of PMOS tube U1A and the collector of triode Q4, two poles respectively One end of the anode difference connecting resistance R29 of pipe D7 and the grid of PMOS tube U1B, hold PWR_5V and lithium battery charging management circuit altogether The anode of middle diode D2,1 foot of 5V power port P9, the total end of discharge tube T7 are connected, and the drain electrode of PMOS tube U1B is as sensing Device power supply side (is connected with system power supply interface PSW), and the base stage of triode Q4 is connected with one end of resistance R5, resistance R5's The other end is connected by connector VDDEN with 14 feet of chip U4 in data processing module.

Lithium battery charging management chip U3 model CN3063；

The controllable accurate source of stable pressure Q2 is the 2.5V reference voltage source chip of model TL431, is supplied for detecting solar energy Piezoelectric voltage.

The booster U7 model FP6291；

The three terminal regulator U2 model XC6214P332PR；

As shown in figure 12, external 5V input or selection can be used too in the power supply in lithium battery charging management circuit Positive energy solar panel power supply.Lithium battery charging management circuit includes the 5V power port and solar panel being connected with 5V power supply Connected solar battery port, the 3.7V lithium battery port being connected with lithium battery BAT, discharge tube T1, T7, diode D1, D2, There are electrode capacitance C1, C6 (as filter capacitor) and charging manager U3；Discharge tube T1 and T7 be used for surge protection, diode D1 and For anti-reverse, circuit power input can choose as solar energy or 5V power supply power supply D2, for solar-powered, 4 feet (VIN) for protecting circuit that solar powered end is connected to charging manager U3 are made up of diode D1 and discharge tube T1 With 3 feet (GND), by have electrode capacitance C6 give lithium battery charge, charging manager U3 just in charging status signal output end CH Pin (7 foot) and fully charged status signal output OK pin (6 foot) be separately connected chip U4 in data processing module 3 feet and 2 feet are connected.The cathode of diode Dl and D2 are also connected with solar panel power supply out splice going splice (SDC connector), 5V input power It is directly connected to 5V power connection VCC5V.

System passes through diode D1 using solar powered end, discharge tube T1 or 5V input power passes through discharge tube T7, Diode D2 is as external power supply power supply and lithium battery charging input power；Capacitor C1, charging manager U3, resistance R12, capacitor C6 forms lithium battery charging circuit, provides suitable charging modes for lithium battery；This circuit is that system work increases a kind of confession Electric mode improves system environments adaptability, enhances system job stability and safety.Diode D1, D2, discharge tube T1, T7 provides protective effect for lithium battery charging input end mouth, reduces static electricity on human body, external surge interference etc. and impacts to system.

As shown in figure 13, power supply automatic switchover circuit includes resistance R34, R35, R36, R38, R41, R42, R43, controllable essence Close source of stable pressure Q2, PMOS tube U8A, U8B, triode Q8, Q1, diode D5, three terminal regulator U2, the wherein leakage of PMOS tube U8A Electric manager U3 in the total end SDC and lithium battery charging management circuit of pole, the cathode of controllable accurate source of stable pressure Q2 and resistance R42 4 feet are connected, and input as sun-generated electric power, only when total end SDC is higher than 4.9V, pass through resistance R42 and R43, controllable accurate Source of stable pressure Q2, triode Q8 and Q1, PMOS tube U8A and U8B composition power input selector, at this time PMOS tube U8A conducting and U8B It is not turned on, sun-generated electric power is by diode D5 and has electrode capacitance C7 to provide input power to three terminal regulator U2, works as solar energy Brownout, PMOS tube U8A is not turned on, PMOS tube U8B is connected, the battery power supply of power input selector selection at this time, PMOS tube The drain electrode of U8B, diode D5 anode total end VFF by there is the end VIN of electrode capacitance C7 and three terminal regulator U2 (2 foot) phase Even.Wherein the parasitic diode of PMOS tube U8A and U8B is backward dioded, with normal diode on the contrary, to prevent battery from supplying Electric current charges the battery by diode when electric, and lithium battery is caused to overshoot, this is that one of this product innovation and advantage, three ends are steady Depressor U2 is that the switching of system power supply functional mode is realized in system work power supply by there is electrode capacitance C7 to export 3.3V voltage.

Resistance R42, R43, R34 and triode Q2 form input power gate, by triode Q8, Q1, resistance R41, R36, R35, R38, PMOS tube U8A and U8B form power supply selection circuit, are controlled according to power supply gate state using external Input power SDC uses battery VFF and diode D5, PMOS tube U8B as three terminal regulator U2 prime input power；Electricity Hold C2, three terminal regulator U2, capacitor C7 and constitute working power circuit, provides normal work power supply for data processing module；This electricity Road meeting intelligent selection uses external power supply or lithium battery to input as data processing module power supply, can guarantee at data Managing module being capable of normal table operation；Wherein the source electrode and drain electrode selection reversal connection mode of PMOS tube U8B and U8A is to supply in order to prevent Electric input current reversely flows into lithium battery by parasitic diode, and lithium battery is caused to overcharge.

As shown in figure 14, working sensor power circuit is the PSW being connected with lithium battery BAT respectively there are two types of input power The anode of the diode D7 that the power supply connector PSW of drain electrode (PMOS tube U1B) is connected with 5V power supply, resistance R29 and PMOS tube U1B The total end PWR_5V of grid.Circuit includes P metal-oxide-semiconductor U1B, U1A, resistance R5, R8, R29, R1, R2, R3, diode D3, D7, and three Pole pipe Q4, capacitor C3, C21, zener diode T4, inductance L1 and fuse F1；When circuit use lithium battery BAT as circuit before When level power supply inputs, the grid of P metal-oxide-semiconductor U1B is connected by resistance R29 with ground, P metal-oxide-semiconductor U1B conducting, P metal-oxide-semiconductor U1B's Source electrode and drain electrode increases a reversed parasitic diode, and electric current charges the battery by diode when preventing battery from powering, and causes Lithium battery overshoot.Input terminal by filter capacitor C14 and C3 as booster U7, while (inductance L1, boosting with pin VEE The total end that 4 feet of device U7,5 feet, the anode for having electrode capacitance C3, capacitor C14 drain with PMOS tube U1A) it is connected as booster circuit The test point of supply voltage detection.The OC pin (6 foot) of booster U7 is connected to ground by resistance R1, and FB pin (3 foot) connects It is grounded between resistance R2 and R3 by R3.Booster U7 output end (1 foot) connects diode D3 and passes through filter capacitor C15 and C21 It is connected later with fuse F1,5V pin VDD (VDD output port of power source) is then connected to by zener diode T4；Work as number When exporting high level according to the port VDDEN (14 foot) of chip U4 in processing module, triode Q4 saturation conduction, to make P MOS Pipe U1A conducting is that rear class sensor circuit is powered, when the port VDDEN (14 foot) of chip U4 in data processing module exports low electricity Usually, triode Q4 ends, so that MOS U1A ends, it is no longer the power supply of rear class sensor circuit.

PMOS tube U1B, resistance R29 and diode D7 constitute external 5V power supply and lithium battery power supply automatic switchover circuit, When external 5V power supply works normally, it can preferentially select this power supply to system power supply；PMOS tube U1A, resistance R8, R5 and triode Q4 constitutes sensor power supply output control circuit, and data processing module controls the output of probe power as needed Function；Capacitor C3, booster U7, inductance L1, diode D3, resistance R1, R2, R3, capacitor C15, C21 constitute sensor power supply Circuit is managed, system is in lithium battery power supply, and with the electric discharge of lithium battery, cell output voltage can be reduced constantly, it is contemplated that be Farther out from extension set, the conducting wire pressure drop for connecting extension set and sensor is larger, when lithium battery forces down for sensor in actual use for system When to a certain extent, sensor job insecurity or cisco unity malfunction due to electricity shortage will lead to, so designing this power supply Circuit is managed, effect is that unstable cell output voltage is converted to stable DC5V power supply output, improves sensor work The reliability of work extends the use distance of sensor.Fuse F1 and zener diode T4 constitutes probe power output The protective effect of port, power supply output short-circuit caused by preventing artificially, static electricity on human body, external surge interference etc. cause to damage to system It is bad.

The supply voltage detection module includes external power supply voltage detecting circuit, booster circuit supply voltage detection electricity Road and booster circuit output voltage detecting circuit, external power supply voltage detecting circuit include resistance R30, R31, and the one of resistance R30 End is connected with one end of resistance R31,21 feet of chip U4 in total terminating data processing module, another termination lithium electricity of resistance R30 The other end of power supply the out splice going splice SDC, resistance R31 of pond charge management circuit are grounded；Booster circuit supply voltage detection circuit Including resistance R7, R13, one end of resistance R7 is connected with one end of resistance R13, the 22 of chip U4 in total terminating data processing module Foot, the test point VEE of the booster circuit supply voltage detection of another termination working sensor power circuit of resistance R7, resistance The other end of R13 is grounded；Booster circuit output voltage detecting circuit includes resistance R4, R10, one end of resistance R4 and resistance R10 One end be connected, altogether in terminating data processing module chip U4 23 feet, another termination working sensor power supply electricity of resistance R4 The other end of VDD the output port of power source VDD, resistance R10 on road are grounded.

Supply voltage detection module as seen in figs. 15-17 includes external power supply voltage detecting circuit, booster circuit power supply Voltage detecting circuit and booster circuit output voltage detecting circuit.

External power supply voltage detecting circuit is made of resistance R30, R31, and resistance R30 first end is for connecting lithium battery charging The voltage input end for managing circuit, connects after then connecting with resistance R31 with ground, and resistance R30 and R31 connector intermediate contact is used In the outer power voltage detection data input terminal AD0 (21 foot) of connection data processing module.

The detection of booster circuit supply voltage includes resistance R7, R13, and resistance R7 first end is used for the voltage input of booster circuit End, connects after then connecting with resistance R13 with ground, and resistance R7 and R13 connector intermediate contact is for connecting data processing module Booster circuit supply voltage detection data input terminal AD1 (22 foot).

The detection of booster circuit output voltage includes resistance R4, R10, and resistance R4 first end is defeated for connecting booster circuit voltage Enter end, connect after then being connect with resistance R10 with ground, resistance R4 and R10 connector intermediate contact is for connecting data processing mould The booster circuit output voltage detection data input terminal AD2 (23 foot) of block.

In conclusion compared with prior art, the utility model has the advantage that

The utility model has technical effect beneficial below:

4, adaptable: it is system power supply that lithium battery is used in intensity of illumination deficiency, is only opening acquisition grain temperature It the use of lithium battery is the power supply of grain temperature sensor when operation, other times close power supply, battery loss is reduced, when sunny, The use of solar energy is lithium battery charging, and the use of solar energy is that whole system and working sensor are powered, makes full use of resource, subtract Few energy waste；

5, communication distance is remote: using wireless communication technique by wireless communication unit based on ad hoc network function with it is corresponding Measurement and control host computer establishes wireless telecommunications convenient for networking.It is more convenient without manually carrying out complicated path setting and maintenance；

6, extend lithium battery service life: using solar energy and the box-like power supply scheme of lithium battery group, environmental suitability By force, intelligent power supply module uses intelligent electric power management mechanism, effectively reduces the charge and discharge number of lithium battery, extends making for lithium battery With the service life, solar energy utilization ratio is improved, extending no light is that lithium battery uses the time.Energy utilization rate is high, long service life, function It consumes low.

Claims

1. a kind of sensor interface circuitry for grain feelings detection extension set, which is characterized in that including circuit board and be arranged in circuit Data processing module and sensor interface module on plate, the data processing module include chip U4,1 foot of chip U4 with One end of capacitor C13 is connected, and end is 3.3V power input altogether, and the other end of capacitor C13 is grounded, and 7 feet of chip U4 connect respectively One end of resistance R14 and one end of capacitor C8, the other end ground connection of capacitor C8, the other end of resistance R14 is 3.3V power input End, 13 feet of chip U4 respectively with 19 feet of chip U4,64 feet, 48 feet, 32 feet, one end of capacitor C9, capacitor C10 one end, One end of capacitor C11 is connected with one end of capacitor C12, and end is 3.3V power input altogether, and the other end of capacitor C9 connects electricity respectively Hold the other end, the other end of capacitor C11 and the other end of capacitor C12 of C10, end ground connection, 60 feet of chip U4 connect electricity respectively altogether One end of R20 and the collector of triode Q5, the other end ground connection of resistance R20 are hindered, the emitter of triode Q5 distinguishes connecting resistance One end of R23 and 1 foot of port P1, end is 3.3V power input altogether, and the other end of resistance R23 connects the base of triode Q5 respectively One end of pole and resistance R22, the other end of resistance R22 are connected with 5 feet of port P1,2 feet of port P1 and 42 feet of chip U4 It is connected, 3 feet of port P1 are connected with 43 feet of chip U4,4 ground connection of port P1,49 foot phases of 7 feet and chip U4 of port P1 Even, 8 feet of port P1 are connected with 46 feet of chip U4,5 feet of chip U4 connect respectively crystal oscillator M2 one end and capacitor C16 one End, the other end of capacitor C16 are connected with one end of capacitor C17, and end ground connection, the other end of capacitor C17 connect crystal oscillator M2's respectively altogether 6 feet of the other end and chip U4；27 feet of chip U4 connect the base stage of triode Q9 through resistance R39, and the emitter of triode Q9 connects Ground, collector are connected with sensor interface module, and 57 feet of chip U4 meet the base stage of triode Q10, triode Q9 through resistance R40 Emitter ground connection, collector is connected with sensor interface module；28 feet of chip U4 are grounded through resistance R17,31 feet, 47 feet, 63 feet, 18 feet, 12 foot earths；

The sensor interface module includes 4 identical grain temperature channel data Acquisition Circuits, and each grain temperature channel data is adopted Collector corresponds to 2 grain temperature data acquisition channels comprising PMOS tube U6B, U5B, U9A, U9B, triode Q3, Q6, protector T2 and protection diode D6, protector T2 and protection diode D6 have identical two, and the source electrode of PMOS tube U6B connects electricity respectively Hold one end of C25, one end of capacitor C26, one end of resistance R26, the source electrode of PMOS tube U9B, one end of resistance R28, resistance R16 One end, the source electrode of PMOS tube U9A, one end of resistance R24, one end of resistance R27, resistance R11 one end and, PMOS tube U6A Source electrode, end is VDD power input altogether, and the grid of PMOS tube U6B is connected with the other end of resistance R24, is total to chip termination U4 A corresponding CHPWR [8..1] port, the drain electrode of PMOS tube U6B connect respectively the collector of triode Q3, resistance R27 it is another End, one end of resistance R19, one end of capacitor C23, one end of first protector T2 and first protection diode D6 it is negative Pole, end is used as output end CHx_OUT and an input terminal CHI [8..1] corresponding with chip U4 in data processing module port altogether It is connected and is used as input terminal, the other end of the grid connecting resistance R11 of PMOS tube U6A is held and U4 pairs of chip in data processing module altogether The port [8..1] CHH answered is connected, and the other end of the drain electrode connecting resistance R19 of PMOS tube U6A, the base stage of triode Q3 is through electricity Resistance R32 connects a corresponding CHL [8..1] port chip U4 in data processing module, and the emitter of triode Q3 connects capacitor respectively The other end of C23, the other end of capacitor C25, the other end of capacitor C26, the emitter of triode Q6, one end of capacitor C24, One end of two protector T2, the other end of first protector T2, one end of second protection diode D6 and first guarantor The other end of diode D6 is protected, end is grounded altogether, the other end of the grid connecting resistance R16 of PMOS tube U9A, altogether end and data processing mould The port [8..1] a corresponding CHH chip U4 is connected in block, one end of the drain electrode connecting resistance R21 of PMOS tube U9A, resistance R21 The other end meet the drain electrode of PMOS tube U9B, the other end of resistance R28, the other end of capacitor C24, second protector T2 respectively The other end and second protection diode D6 the other end, end is as output end CHx_OUT and input terminal and data processing altogether The port [8..1] a corresponding CHI chip U4, which is connected, in module is used as input terminal, the grid connecting resistance R26's of PMOS tube U9B The other end holds the port [8..1] a CHPWR corresponding with chip U4 to be connected altogether, and the base stage of triode Q6 connects number through resistance R33 According to a corresponding CHL [8..1] port chip U4 in processing module.

2. the sensor interface circuitry according to claim 1 for grain feelings detection extension set, which is characterized in that the sensing Device interface module further includes integrated wiring terminal module, and integrated wiring terminal module includes sensor and power switch port P4,8 1 foot and 2 feet of a access port P5, sensor and power switch port P4 are energization input；3 feet respectively with ESD protection One end of device T6 is connected with 1 foot of 8 access port P5, and holding altogether is power input, and the 4 of sensor and power switch port P4 Foot, 5 feet are connected with communication module respectively, and 6 feet of sensor and power switch port P4 connect the other end of ESD protection device T6 respectively With 2 feet of 8 access port P5, end ground connection, the 3-10 foot of 8 access port P5 are acquired with 4 grain temperature channel datas respectively altogether The corresponding output end CHx_OUT of circuit is connected.

3. the sensor interface circuitry according to claim 2 for grain feelings detection extension set, which is characterized in that described is logical Letter module includes buzzer U10, RS_485 communication chip U5 and communication port P7, the power input of buzzer U10 respectively with One end of capacitor C18, end is used as power input altogether, and the signal input part of buzzer U10 is connected with the collector of triode Q7, The base stage of triode Q7 connects 4 feet of chip U4 in data processing module through resistance R25, the emitter capacity C18's of triode Q7 The other end is connected, and end ground connection, 1 foot of RS_485 communication chip U5 are connected with 17 feet of chip U4 in data processing module altogether, RS_ 2 feet of 485 communication chip U5 are connected with 20 feet of chip U4 in data processing module, 3 feet and number of RS_485 communication chip U5 It is connected according to 15 feet of chip U4 in processing module, the 16 of chip U4 in 4 feet and data processing module of RS_485 communication chip U5 Foot be connected, 5 feet of RS_485 communication chip U5 connect respectively one end of capacitor C19, one end of resistance R6, protector T3 one end, One end of protector T5, altogether end ground connection, RS_485 communication chip U5 6 feet difference connecting resistance R9 one end and resistance R15 one End, the other end of resistance R9 are 3.3V power input, one end of the other end difference connection protector T8 of resistance R15 and protector The other end of T5 terminates 4 feet of sensor and power switch port P4 in integrated wiring terminal module, RS_485 communication chip altogether The other end of the 7 feet difference connecting resistance R6 of U5 and one end of resistance R18, the other end difference connection protector T8's of resistance R18 is another The other end of one end and protector T3 terminates 5 feet of sensor and power switch port P4 in integrated wiring terminal module altogether, 8 feet of RS_485 communication chip U5 are connected with the other end of capacitor C19, and holding altogether is 3.3V power input, and the 1 of communication port P7 Foot ground connection, 2 feet connect one end of one end of wire jumper J1, one end of wire jumper J2 and capacitor C20 respectively, and the other end of wire jumper J1 is 3.3V Power input, the other end of wire jumper J2 are 5V power input, and the other end of capacitor C20 is grounded, 3 feet of communication port P7 with 29 feet of chip U4 are connected in data processing module, 30 foot phases of 4 feet of communication port P7 and chip U4 in data processing module Even, the 5 feet ground connection of communication port P7.