CN108717284A

CN108717284A - The sensor interface circuitry of extension set is detected for grain feelings

Info

Publication number: CN108717284A
Application number: CN201810859528.2A
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
Priority date: 2018-08-01
Filing date: 2018-08-01
Publication date: 2018-10-30

Abstract

The present invention relates to the sensor interface circuitries that extension set is detected for grain feelings; technical solution is; include the data processing module and sensor interface module of 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; each grain temperature channel data Acquisition Circuit corresponds to 2 grain temperature data acquisition channels; it includes PMOS tube U6B, U5B, U9A, U9B, triode Q3, Q6; protector T2 and protection diode D6, load capacity of the present invention are strong：Extension set has 8 acquisition channels altogether, and each channel at most can access 120 temperature measuring points.960 temperature measuring points can be accommodated altogether.1 extension set can be for using between 1,2,4 or 8 Ao；Strong antijamming capability, easy to operate, communication distance is remote, without the artificial path setting for carrying out complexity and safeguards, more convenient.

Description

The sensor interface circuitry of extension set is detected for grain feelings

Technical field

The present invention relates to grain storage detection technique field, especially a kind of sensor interface for grain feelings detection extension set Circuit.

Background technology

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

1, communication mode is inconvenient：Node connectedness communication mode, extension set and master are used 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 datas, it is necessary to path as A-B-C is set in advance, this communication mode setting trouble, 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 the use of be that network node mode wirelessly communicates, if point Machine and host are apart from too far, and signal of communication receives bad, communication abnormality between leading to node；

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 two kinds of solar panels and 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, is reduced to the transfer efficiency of solar energy；

6, service life is short：One 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 need not give grain temperature sensor to power, only always during normal use System can just power when needing to acquire grain temperature, so substantially 30 points of the 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 detection product is to be always maintained at system electricity Source powers, and 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.

Invention content

For the above situation, to overcome the defect of the prior art, the purpose of the present invention is just to provide a kind of easy to operate, negative Loading capability is strong, the strong antijamming capability sensor interface circuitry for grain feelings detection extension set.

The technical solution that the present invention solves is：

A kind of sensor interface circuitry for grain feelings detection extension set includes the data of 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 capacitance C13's One end is connected, and end is 3.3V power inputs (the 3.3V power output ends with the total end and intelligent power supply module of capacitance C13 altogether VCC3.3V is connected), the other end ground connection of capacitance C13, one end of the 7 feet difference connecting resistance R14 of chip U4 and the one of capacitance C8 The other end at end, the other end ground connection of capacitance C8, resistance R14 is 3.3V power inputs (the 3.3V electricity with intelligent power supply module Source output terminal VCC3.3V is connected), 13 feet of chip U4 respectively with 19 feet of chip U4,64 feet, 48 feet, 32 feet, capacitance C9 One end, one end of capacitance C10, capacitance C11 one end be connected with one end of capacitance C12, altogether end be 3.3V power inputs (with The 3.3V power output ends VCC3.3V of intelligent power supply module is connected), the other end of capacitance C9 connect respectively the other end of capacitance C10, The other end of the other end and capacitance C12 of capacitance C11, end ground connection altogether, one end of the 60 feet difference connecting resistance R20 of chip U4 and The collector of triode Q5, the other end ground connection of resistance R20, one end and end of the emitter difference connecting resistance R23 of triode Q5 1 foot of mouth P1, end is 3.3V power inputs (being connected with the 3.3V power output ends VCC3.3V of intelligent power supply module), electricity altogether The other end of resistance R23 connects one end of the base stage and resistance R22 of triode Q5, the other end of resistance R22 and 5 feet of port P1 respectively It is connected, 2 feet of port P1 are connected with 42 feet of chip U4, and 3 feet of port P1 are connected with 43 feet of chip U4, and the 4 of port P1 connects Ground, 7 feet of port P1 are connected with 49 feet of chip U4, and 8 feet of port P1 are connected with 46 feet of chip U4,5 feet point of chip U4 One end of one end and capacitance C16 of crystal oscillator M2 is not connect, the other end of capacitance C16 is connected with one end of capacitance C17, altogether end ground connection, The other end of capacitance C17 connects the other end of crystal oscillator M2 and 6 feet of chip U4 respectively；27 feet of chip U4 connect three poles through resistance R39 The base stage of pipe Q9, the emitter ground connection of triode Q9, collector and connected (the corresponding CHPWR [8..1] of sensor interface module End is connected), 57 feet of chip U4 connect the base stage of triode Q10 through resistance R40, the emitter ground connection of triode Q9, collector with Sensor interface module is connected (corresponding CHPWR [8..1] end is connected)；28 feet of chip U4 are grounded through resistance R17,31 feet, 47 Foot, 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 2 grain temperature data acquisition channels are corresponded to according to 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 point of PMOS tube U6B Do not connect one end of capacitance C25, one end of capacitance C26, one end of resistance R26, the source electrode of PMOS tube U9B, resistance R28 one end, One end of resistance R16, the source electrode of PMOS tube U9A, one end of resistance R24, one end of resistance R27, resistance R11 one end and, The source electrode of PMOS tube U6A, end is VDD power inputs (the VDD output port of power source for connecing working sensor power circuit) altogether, The grid of PMOS tube U6B is connected with the other end of resistance R24, and a corresponding CHPWR [8..1] ports chip termination U4 (are divided altogether Not Wei chip U4 44 feet, 54 feet, 27 feet, 57 feet, 61 feet, 35 feet, 39 feet, 51 feet), the drain electrode of PMOS tube U6B connects three respectively The collector of pole pipe Q3, the other end of resistance R27, one end of resistance R19, one end of capacitance C23, first protector T2 The cathode of one end and first protection diode D6 is held as output end CHx_OUT (be connected with corresponding out splice going splice CHx_ altogether OUT, wherein x be 1-8, represent the output end in 8 channels) and input terminal it is one corresponding with data processing module chips U4 Be connected conduct for port CHI [8..1] (being respectively 45 feet, 55 feet, 58 feet, 62 feet, 33 feet, 37 feet, 40 feet, 52 feet of chip U4) Input terminal, the other end of the grid connecting resistance R11 of PMOS tube U6A, end is one corresponding with data processing module chips U4 altogether Port CHH [8..1] (being respectively 41 feet, 50 feet, 56 feet, 59 feet, 34 feet, 36 feet, 38 feet, 53 feet of chip U4) is connected, The other end of the drain electrode connecting resistance R19 of PMOS tube U6A, the base stage of triode Q3 connect data processing module chips through resistance R32 A corresponding CHL [8..1] ports U4 (respectively 26 feet of chip U4,28 feet, 8 feet, 9 feet, 10 feet, 11 feet, 24 feet, 25 Foot), the emitter of triode Q3 meets the other end of capacitance C23, the other end of capacitance C25, the other end of capacitance C26, three respectively The emitter of pole pipe Q6, one end of capacitance C24, one end of second protector T2, the other end of first protector T2, The other end of one end and first protection diode D6 of two protection diode D6 holds ground connection, the grid of PMOS tube U9A altogether The other end of connecting resistance R16, an end CHH [8..1] port corresponding with data processing module chips U4 (is respectively core altogether 41 feet, 50 feet, 56 feet, 59 feet, 34 feet, 36 feet, 38 feet, 53 feet of piece U4) it is connected, the drain electrode connecting resistance R21 of PMOS tube U9A One end, the other end of resistance R21 connect respectively the drain electrode of PMOS tube U9B, the other end of resistance R28, capacitance C24 the other end, The other end of the other end and second protection diode D6 of second protector T2, end is as output end CHx_OUT (connections altogether Have a corresponding out splice going splice CHx_OUT, wherein x is 1-8, represents the output end in 8 channels) and input terminal and data processing mould A corresponding CHI [8..1] ports block chips U4 (respectively 45 feet of chip U4,55 feet, 58 feet, 62 feet, 33 feet, 37 Foot, 40 feet, 52 feet) being connected is used as input terminal, and the other end of the grid connecting resistance R26 of PMOS tube U9B is held and U4 pairs of chip altogether CHPWR [8..1] port (respectively 44 feet of chip U4,54 feet, 27 feet, 57 feet, 61 feet, 35 feet, 39 feet, 51 answered Foot) it is connected, the base stage of triode Q6 connects a corresponding CHL [8..1] ports data processing module chips U4 through resistance R33 (being respectively 26 feet, 28 feet, 8 feet, 9 feet, 10 feet, 11 feet, 24 feet, 25 feet of chip U4).

The present invention has technique 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 devices T4 is used for Protect subordinate machine system power supply not by extraneous such as thunder and lightning interference；

3, easy to operate：It only needs grain temperature cable being articulated on main line, be acquired by main line grain temperature corresponding with extension set Channel connects, and host is communicated with extension set, and obtaining extension set by wireless transmission collects 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 safeguarding；

Description of the drawings

Fig. 1-7 is the circuit diagram of the data processing module of the present invention.

Fig. 8 is inventive sensor interface module grain temperature channel data Acquisition Circuit schematic diagram.

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

Figure 10 is the circuit diagram of communication module of the present invention.

Figure 11 is the circuit frame schematic diagram of use state of the present invention.

Figure 12-14 is the circuit diagram of intelligent power supply module of the present invention；

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

Figure 13 power supply automatic switchover circuit schematic diagrams：

Figure 14 working sensor power circuit principle figures.

Figure 15-17 is supply voltage detection module circuit diagram of the present invention：

Wherein Figure 15 is externally fed 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 use state of the present invention.

Specific implementation mode

The specific implementation mode of the present invention is described in further detail below in conjunction with attached drawing.

It is provided by Fig. 1-18, the present invention includes that circuit board and the data processing module and sensor that are arranged on circuit boards connect Mouth mold block, the data processing module include chip U4, and 1 foot of chip U4 is connected with one end of capacitance C13, and end is 3.3V altogether Power input (is connected) with the total end of capacitance C13 with the 3.3V power output ends VCC3.3V of intelligent power supply module, capacitance C13 Other end ground connection, one end of one end and capacitance C8 of the 7 feet difference connecting resistance R14 of chip U4, the other end ground connection of capacitance C8, The other end of resistance R14 is 3.3V power inputs (being connected with the 3.3V power output ends VCC3.3V of intelligent power supply module), 13 feet of chip U4 respectively with 19 feet of chip U4,64 feet, 48 feet, 32 feet, one end of capacitance C9, one end of capacitance C10, capacitance One end of C11 is connected with one end of capacitance C12, and end is that 3.3V power inputs are (defeated with the 3.3V power supplys of intelligent power supply module altogether Outlet VCC3.3V is connected), the other end of capacitance C9 meets the other end of capacitance C10, the other end of capacitance C11 and capacitance C12 respectively The other end, end ground connection altogether, the collector of one end and triode Q5 of the 60 feet difference connecting resistance R20 of chip U4, resistance R20's The other end is grounded, and 1 foot of one end and port P1 of the emitter difference connecting resistance R23 of triode Q5, end is that 3.3V power supplys are defeated altogether Enter end (being connected with the 3.3V power output ends VCC3.3V of intelligent power supply module), the other end of resistance R23 connects triode respectively One end of the base stage and resistance R22 of Q5, the other end of resistance R22 are connected with 5 feet of port P1,2 feet and the chip U4 of port P1 42 feet be connected, 3 feet of port P1 are connected with 43 feet of chip U4, and the 4 of port P1 is grounded, 7 feet of port P1 and chip U4's 49 feet are connected, and 8 feet of port P1 are connected with 46 feet of chip U4, and 5 feet of chip U4 meet one end and the capacitance C16 of crystal oscillator M2 respectively One end, the other end of capacitance C16 is connected with one end of capacitance C17, and end ground connection, the other end of capacitance C17 connect crystal oscillator respectively altogether The other end of M2 and 6 feet of chip U4；27 feet of chip U4 connect the base stage of triode Q9, the transmitting of triode Q9 through resistance R39 Pole is grounded, and collector is connected (corresponding CHPWR [8..1] end is connected) with sensor interface module, and 57 feet of chip U4 are through 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 ends CHPWR [8..1] are 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) provides normal work power supply；The ports VDDEN (14 foot) of chip U4 control intelligent power supply mould electricity in the block Source connected state, U2_TXD (16 foot), U2_RXD (17 foot), 485_RE (20 foot) and the 485_DE (15 foot) four of chip U4 The function of port is respectively data transmission, data receiver, reception is all-round and transmission is enabled, this four ports are connected to communication module RS485 telecommunication circuits, for and the communication of storehouse temperature storehouse wet sensor.ADO (21 foot), AD1 (22 foot) and the AD2 (23 of chip U4 Foot) port be subordinate machine system supply voltage detect port, these three ports are connected to supply voltage detection module, the wherein ends ADO Mouth detection externally fed supply voltage, AD1 Port detecting booster circuit supply voltages, AD2 Port detecting booster circuits output electricity Pressure, the OK (2 foot) of chip U4 and CH (3 foot) port are that lithium battery charged state detects port, and the wherein ports OK are full of for battery Signal, the ports CH are battery just in charging signals；The U3_TXD (29 foot) of chip U4 and U3_RXD (30 foot) port are connected to logical Believe that the wireless communication port of module, function are respectively data transmission and data receiver, chip U4's passes through the two ports and nothing Line telecommunication circuit communicates, for receiving order that measurement and control host computer is sent or sending collected data to measurement and control host computer.CHI 8 passways of [8..1] corresponding extension set (45 feet, 55 feet, 58 feet, 62 feet, 33 feet, 37 feet, 40 feet, 52 feet of corresponding chip U4), For detecting the grain temperature sensor data connected on each channel.The power supply port in the corresponding each channels CHPWR [8..1], For powering to Air conduct measurement, CHL [8..1] (26 feet of corresponding chip U4,28 feet, 8 feet, 9 feet, 10 feet, 11 feet, 24 feet, 25 Foot) to be used for control output end CH_OUT be low level, CHH [8..1] (41 feet of corresponding chip U4,50 feet, 56 feet, 59 feet, 34 Foot, 36 feet, 38 feet, 53 feet) it is used for control output end CH_OUT as high level, input terminal CHI [8..1] is directly connected to output end CH_OUT makes it be consistent, as shown in figure 5, providing the circuit diagram of the grain temperature channel data acquisition in 2 channels.

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

The ends VBAT (1 foot) of chip U4 and capacitance C13 form real-time clock power circuit, make real-time clock normal operation. 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, 8 sensor passages of control 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 ensure 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 ends 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 respectively with ESD protection device T6 One end be connected with 1 foot of 8 access port P5, altogether end be power input (connect working sensor power circuit VDD electricity Source output terminal mouth), 4 feet, 5 feet of sensor and power switch port P4 are connected with communication module respectively, and sensor and power supply are opened 6 feet of pass port P4 connect 2 feet of the other end and 8 access port P5 of ESD protection device T6 respectively, altogether end ground connection, 8 channels Output end CHx_OUT corresponding with 4 grain temperature channel data Acquisition Circuits (is connected with corresponding defeated the 3-10 feet of port P5 respectively Go out connector CHx_OUT, wherein x is 1-8, represents the output end in 8 channels) it is connected.

The protector T2 models PESD5V0L2BT；

The protection diode D6 models 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, corresponds to 27 feet and 35 feet of chip U4 respectively；CHI [8..1] is held Mouth is respectively CH1_I and CH2_I, corresponds to the ports CHI1 and the ports CHI2 (33 feet and 37 feet) of chip U4 respectively； CHH The port [8..1] is respectively CH1_H and CH2_H, corresponds to the ports CHH1 and the ports CHH2 (34 feet and 36 feet) of chip U4 respectively； Connector CHx_OUT is respectively CH1_OUT and CH2_OUT, and being connected respectively with the corresponding ports of integrated wiring terminal module, (8 logical The CH2 of the 3 foot CH1 and 4 feet of road port P5)；The port CHL [8..1] is respectively CH1_L and CH2_L, corresponds to chip U4's respectively The ports CHL1 and the ports CHL2 (24 feet and 25 feet)；This is the grain temperature channel Acquisition Circuit in 2 channels, other channels and this circuit It is identical；

CHx_PWR connects P metal-oxide-semiconductor U6B grids with power vd D by R24, when input low level control PMOS pipes are led It is logical, so that output end CHx_OUT is connected with VDD and exports high level；CHxH connects P metal-oxide-semiconductor U6A grids with power vd D by R11, Control CHx_H output low and high levels carry out the state of control output end CHx_OUT.CHx_I is directly connected with output end CHx_OUT, The transition of output end CHx_OUT is identical as input terminal CHx_I；Input CHx_L passes through current-limiting resistance R32 and NPN triode Q3 bases Extremely it is connected, the collector of triode Q3 is directly connected with output end CHx_OUT, and emitter and the ground short circuit of triode Q3 pass through Notify 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 and 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 composition output state controls Circuit, data processing module carry out control output end CHx_OUT states as needed.CHx_I directly with output end CHx_OUT phases Even, the status information for reading output end CHx_OUT.Output is formed by capacitance C23, protector T2 and protection diode D6 Protector reduces static electricity on human body, external surge interference etc. and is impacted 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 devices) is for protecting subordinate machine system power supply not by extraneous such as thunder and lightning interference.

The communication module includes buzzer U10, RS_485 communication chip U5 and communication port P7, buzzer U10's Power input one end with capacitance C18 respectively, as power input, (and power supply automatic switchover circuit VCC power supplys are 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 (ports BEEP) of data processing module chips U4, and the other end of the emitter capacity C18 of triode Q7 is connected, End ground connection, 1 foot of RS_485 communication chips U5 are connected with 17 feet of data processing module chips U4 altogether, and RS_485 communicates core 2 feet of piece U5 are connected with 20 feet of data processing module chips U4,3 feet and the data processing mould of RS_485 communication chips U5 15 feet of block chips U4 are connected, and 4 feet of RS_485 communication chips U5 are connected with 16 feet of data processing module chips U4, 5 feet of RS_485 communication chips U5 meet one end of capacitance C19, one end of resistance R6, one end of protector T3, protector T5 respectively One end, end ground connection altogether, one end of one end and resistance R15 of the 6 feet difference connecting resistance R9 of RS_485 communication chips U5, resistance R9 The other end be 3.3V power inputs (being connected with the 3.3V power output ends VCC3.3V in power supply automatic switchover circuit), it is electric The other end for hindering one end and protector T5 of the other end difference connection protector T8 of R15, terminates in integrated wiring terminal module altogether 4 feet of sensor and power switch port P4, the other end and resistance of the 7 feet difference connecting resistance R6 of RS_485 communication chips U5 One end of R18, the other end of the other end and protector T3 of the other end difference connection protector T8 of resistance R18, termination is integrated altogether 5 feet of sensor and power switch port P4 in connection terminal module, 8 feet of RS_485 communication chips U5 are another with capacitance C19's One end is connected, and end is 3.3V power inputs (with the 3.3V power output end VCC3.3V phases in power supply automatic switchover circuit altogether Even), the 1 foot ground connection of communication port P7,2 feet connect one end of one end of wire jumper J1, one end of wire jumper J2 and capacitance C20, jump respectively The other end of line J1 is 3.3V power inputs (with the 3.3V power output end VCC3.3V phases in power supply automatic switchover circuit Even), the other end of wire jumper J2 is 5V power inputs (with the 5V power supply power supply output end phases in lithium battery charging management circuit Even), the other end ground connection of capacitance C20,3 feet of communication port P7 are connected with 29 feet of data processing module chips U4, communicate 4 feet of port P7 are connected with 30 feet of data processing module chips U4, 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 buzzers of 5V sold in the market；

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

As shown in the circuit diagram of Figure 10 communication modules, communication module includes the wireless telecommunications list based on ad hoc network function Member, the wet data transmission units of Cang Wencang and buzzer cue circuit, wireless communication unit are an independent radio communication circuits, By USART interfaces (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 circuits, by RS_485 communication chips U5, capacitance 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 protectors, prevent communication bus The electrostatic that upper conduction comes damages chip U5.

Buzzer cue circuit includes buzzer U10, resistance R25, NPN triode Q7 and capacitance 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 supplys or 5V power supplys are selected.

The present invention is in use, further include：

Intelligent power supply module：For providing 3.3V 5V working powers；Output end of powering connects data processing module, leads to The energization input of letter module, supply voltage detection module and sensor interface module；Power source includes that external 5V power supplys supply 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 ports 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 externally fed 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 ports 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 batteries end 2 feet of mouth hold ground connection, 2 feet of charging manager U3 to be 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, altogether end be connected with power supply out splice going splice SDC, two The anode of pole pipe D2 is connected with the other end of 1 foot of 5V power ports P9, discharge tube T7 respectively, as 5V power supply power supply output ends The anode of (being connected with 5V power connection VCC5V), diode D1 connects 1 foot and discharge tube T1 of solar cell 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, have pole respectively The anode of capacitance C6 and 1 foot of 3.7V lithium batteries port, (are connected with 3.7V lithium batteries to connect as 3.7V lithium battery power supplies output end Head BAT+), 6 feet of charging manager U3 are connected with 2 feet of data processing module chips U4,7 feet of charging manager U3 and 3 feet of data processing module chips U4 are connected；

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 be connected to respectively the anode of electrode capacitance C2, the source electrode of PMOS tube U8B, diode D5 cathode, The emitter of triode Q1, one end and PMOS tube U8A of resistance R35 source electrode, altogether end as VCC output port of power source (connection Have VCC power supplys out splice going splice VCC), have the cathode of electrode capacitance C2 be connected to respectively the cathode of electrode capacitance C7, three terminal regulator U2 1 Foot (grounding leg), one end of resistance R37, the emitter of triode Q8, resistance R34 one end, altogether end ground connection (is connected with ground connection Connector GND), the drain electrode of PMOS tube U8B is connected with the anode of diode D5, and the grid of PMOS tube U8B connects triode Q1's respectively The other end of collector and resistance R37, the base stage of triode Q1 connect the collector and resistance of triode Q8 through resistance R38 respectively One end of R36, the grid of the other end and PMOS tube U8A of the other end difference connecting resistance R35 of resistance R36, PMOS tube U8A's Drain electrode connects one end of the cathode and resistance R42 of controllable accurate source of stable pressure Q2 respectively, altogether end and electricity in lithium battery charging management circuit 4 feet of manager U3 are connected, one end of anode difference connecting resistance R41 of controllable accurate source of stable pressure Q2, the other end of resistance R34 and One end of resistance R43, the reference pole of the other end and controllable accurate source of stable pressure Q2 of the other end difference connecting resistance R42 of resistance R43, The base stage of the other end and triode Q8 of resistance R41,3 feet (output pin) of three terminal regulator U2 and the anode for having electrode capacitance C7 It is connected, end is as 3.3V power output ends VCC3.3V altogether (connection 3.3V power supplys export VCC3.3V)；

The working sensor power circuit includes booster U7, PMOS tube U1A, U1B, and 1 foot of booster U7 connects respectively The anode of diode D3 and one end of inductance L1, the cathode of diode D3 respectively one end of connecting resistance R2, have electrode capacitance C15's Positive, one end of capacitance C21 and fuse F1 one end, the other end of resistance R2 connect 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, capacitance 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 holds ground connection, the other end of fuse F1 to be connected with the cathode of zener diode T4 altogether, and end is as the output of VDD power supplys altogether Port (is connected with VDD power supplys out splice going splice VDD), and the other end of inductance L1 connects 4 feet of booster U7,5 feet, has electrode capacitance respectively The test point detected as booster circuit supply voltage is held in the drain electrode of the anode of C3, one end and PMOS tube U1A of capacitance C14 altogether VEE (is connected with booster circuit supply voltage detection tabs VEE), one end of the source electrode difference connecting resistance R8 of PMOS tube U1A, two The source electrode of the cathode and PMOS tube U1B of pole pipe D7 holds VFF and the drain electrode of PMOS tube U8B, two poles in power supply automatic switchover circuit altogether The total end of the anode of pipe D5 is connected, and the other end of resistance R8 connects the collector of the grid and triode Q4 of PMOS tube U1A respectively, and two The grid of one end and PMOS tube U1B of the anode difference connecting resistance R29 of pole pipe D7, holds PWR_5V and lithium battery Charge Management electricity altogether The anode of diode D2,1 foot of 5V power ports P9, the total end of discharge tube T7 are connected in road, and the drain electrode of PMOS tube U1B is as biography Sensor 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 The other end be connected with 14 feet of data processing module chips U4 by connector VDDEN.

Lithium battery charging management chip U3 models CN3063；

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

The booster U7 models FP6291；

The three terminal regulator U2 models XC6214P332PR；

As shown in figure 12, the power supply in lithium battery charging management circuit can be inputted or be selected too using external 5V Positive energy solar panel power supply.Lithium battery charging management circuit includes the 5V power ports and solar panel being connected with 5V power supplys Connected solar cell port, the 3.7V lithium batteries 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 are used for surge protection, diode For D1 and D2 for anti-reverse, circuit power input can be selected as solar energy or 5V power supply power supplies, such as solar-powered For, 4 feet for protecting circuit that solar powered end is connected to charging manager U3 are made up of diode D1 and discharge tube T1 (VIN) and 3 feet (GND), by there is electrode capacitance C6 to charge to lithium battery, charging manager U3's just exports in charging status signal End CH pins (7 foot) and fully charged status signal output OK pins (6 foot) are separately connected the 3 of data processing module chips U4 Foot 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 connectors), 5V inputs Power supply is directly connected to 5V power connections VCC5V.

System using solar powered end by diode D1, discharge tube T1 or 5V input power by discharge tube T7, Diode D2 is as externally fed power supply and lithium battery charging input power；Capacitance C1, charging manager U3, resistance R12, capacitance C6 forms lithium battery charging circuit, and suitable charging modes are provided 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 is impacted 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 The total end SDC of pole, the cathode of controllable accurate source of stable pressure Q2 and resistance R42 and electric manager U3 in lithium battery charging management circuit 4 feet are connected, and are inputted 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 constitute power input selector, PMOS tube U8A conductings at this time 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 pipes U8B is connected, and power input selector selects battery powered, PMOS tube at this time The drain electrode of U8B, the positive total end VFF of diode D5 are by there is the ends 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 Electric current charges the battery by diode when power supply, and lithium battery is caused to overshoot, this is an innovation and advantage of this product, three ends Voltage-stablizer 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 voltages.

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 using external according to power supply gate state Input power SDC uses battery VFF with diode D5, PMOS tube U8B as three terminal regulator U2 prime input powers； Capacitance C2, three terminal regulator U2, capacitance C7 constitute working power circuit, and normal work power supply is provided for data processing module；This Circuit meeting intelligent selection uses external power supply or lithium battery to be inputted as data processing module power supply, can ensure data Processing module being capable of normal table operation；The source electrode and drain electrode selection reversal connection mode of wherein PMOS tube U8B and U8A is in order to prevent Supply input electric 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 Anode, the resistance R29 and PMOS pipe U1B for the diode D7 that (the power supply connector PSW of PMOS tube U1B drain electrodes) is connected with 5V power supplys Grid total end PWR_5V.Circuit includes P metal-oxide-semiconductor U1B, U1A, resistance R5, R8, R29, R1, R2, R3, diode D3, D7, triode Q4, capacitance C3, C21, zener diode T4, inductance L1 and fuse F1；When circuit uses lithium battery BAT conducts When circuit prime power input, the grid of P metal-oxide-semiconductors U1B is connected by resistance R29 with ground, the U1B conductings of P metal-oxide-semiconductors, P metal-oxide-semiconductors The source electrode and drain electrode of U1B increases a reversed parasitic diode, prevents electric current when battery powered from charging the battery by diode, Lithium battery is caused to overshoot.Be used as the input terminal of booster U7 by filter capacitor C14 and C3, at the same with pin VEE (inductance L1, The total end that 4 feet of booster U7,5 feet, the anode for having electrode capacitance C3, capacitance C14 drain with PMOS tube U1A) it is connected as boosting The test point of circuit supply voltage detection.The OC pins (6 foot) of booster U7 are connected to ground by resistance R1, FB pins (3 foot) It is connected between resistance R2 and R3 and is grounded by R3.Booster U7 output ends (1 foot) connection diode D3 passes through filter capacitor C15 It is connected with fuse F1 with after C21,5V pins VDD (VDD output port of power source) is then connected to by zener diode T4； When the ports VDDEN (14 foot) of data processing module chips U4 export high level, triode Q4 saturation conductions, to make P The U1A conductings of MOS pipes are that rear class sensor circuit is powered, when the ports VDDEN (14 foot) of data processing module chips U4 export When low level, triode Q4 cut-offs are no longer powered for rear class sensor circuit to MOS U1A cut-offs.

PMOS tube U1B, resistance R29 and diode D7 constitute external 5V power supplys and lithium battery power supply automatic switchover circuit, When external 5V power supplys work normally, it can preferentially select this power supply to system power supply；PMOS tube U1A, resistance R8, R5 and three poles Pipe Q4 constitutes sensor power supply output control circuit, and data processing module controls the defeated of probe power as needed Go out function；Capacitance C3, booster U7, inductance L1, diode D3, resistance R1, R2, R3, capacitance C15, C21 constitute sensor Power supply management circuit, system is in lithium battery power supply, and with the electric discharge of lithium battery, cell output voltage can be reduced constantly, considers To system, farther out from extension set, the conducting wire pressure drop for connecting extension set and sensor is larger, works as lithium battery for sensor in actual use When forcing down to a certain extent, sensor job insecurity or cisco unity malfunction due to electricity shortage can be led to, so designing this Electric power management circuit, effect are that unstable cell output voltage is converted to stable DC5V power supplys output, improve sensing The reliability of device work, extends the use distance of sensor.Fuse F1 and zener diode T4 constitute probe power System is made in the protective effect of output port, power supply output short-circuit, static electricity on human body, external surge interference etc. caused by preventing artificially At damage.

The supply voltage detection module includes externally fed voltage detecting circuit, booster circuit supply voltage detection electricity Road and booster circuit output voltage detecting circuit, externally fed voltage detecting circuit include resistance R30, R31, and the one of resistance R30 End is connected with one end of resistance R31, altogether 21 feet of terminating data processing module chips U4, 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, altogether the 22 of terminating data processing module chips U4 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 and the resistance R10 of resistance R4 One end be connected, 23 feet of terminating data processing module chips U4 altogether, 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 externally fed voltage detecting circuit, booster circuit power supply Voltage detecting circuit and booster circuit output voltage detecting circuit.

Externally fed voltage detecting circuit is made of resistance R30, R31, and resistance R30 first ends are for connecting lithium battery charging The voltage input end for managing circuit, connects after then being connect 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 ends are used for the control source of booster circuit End, connects after then being connect 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 ends are defeated for connecting booster circuit voltage Enter end, connect with ground after then being connect with resistance R10, 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 present invention has the following advantages：

The present invention has technique 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 When operation, to be powered for grain temperature sensor using lithium battery, other times close power supply, reduce battery loss, when sunny, It is charged for lithium battery using solar energy, and the use of solar energy is that whole system and working sensor are powered, made 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 safeguarding；

6, extend lithium battery service life：Scheme, environmental suitability are supplied using solar energy and lithium battery modular power supply 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, it is lithium battery usage time to extend no light.Energy utilization rate is high, and service life is long, work( 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 on plate and sensor interface module, the data processing module include chip U4,1 foot of chip U4 with One end of capacitance C13 is connected, and end is 3.3V power inputs altogether, and the other end of capacitance C13 is grounded, and 7 feet of chip U4 connect respectively The other end of one end of one end and capacitance C8 of resistance R14, the other end ground connection of capacitance C8, resistance R14 is 3.3V power inputs End, 13 feet of chip U4 respectively with 19 feet of chip U4,64 feet, 48 feet, 32 feet, one end of capacitance C9, capacitance C10 one end, One end of capacitance C11 is connected with one end of capacitance C12, and end is 3.3V power inputs altogether, and the other end of capacitance C9 connects electricity respectively Hold the other end of the other end of C10, the other end and capacitance C12 of capacitance C11, end ground connection, 60 feet of chip U4 connect electricity respectively altogether The collector of one end and triode Q5 of R20, 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 inputs 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 P1,7 feet of port P1 and the 49 foot phases of chip U4 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 capacitance C16 one End, the other end of capacitance C16 are connected with one end of capacitance C17, and end ground connection, the other end of capacitance 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 through resistance R17 be grounded, 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 capacitance 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 inputs 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 capacitance C23, one end of first protector T2 and first protection diode D6 it is negative Pole, end is as output end CHx_OUT and an input terminal CHI [8..1] port corresponding with data processing module chips U4 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 data processing module chips altogether CHH [8..1] port 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] ports data processing module chips U4, and the emitter of triode Q3 connects capacitance respectively The other end of C23, the other end of capacitance C25, the other end of capacitance C26, the emitter of triode Q6, one end of capacitance 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 A corresponding CHH [8..1] ports block chips U4 are connected, 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 capacitance 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 A corresponding CHI [8..1] ports module chips U4, which are connected, is used as input terminal, the grid connecting resistance R26's of PMOS tube U9B The other end, an end CHPWR [8..1] port corresponding with chip U4 is connected altogether, and the base stage of triode Q6 connects number through resistance R33 According to a corresponding CHL [8..1] ports processing module chips U4.

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 end is power input altogether, 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 feet 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 capacitance C18 holds power input, the signal input part of buzzer U10 is used as to be connected with the collector of triode Q7 altogether, The base stage of triode Q7 connects 4 feet of data processing module chips U4 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 chips U5 are connected with 17 feet of data processing module chips U4 altogether, RS_ 2 feet of 485 communication chip U5 are connected with 20 feet of data processing module chips U4,3 feet and number of RS_485 communication chips U5 It is connected according to 15 feet of processing module chips U4,4 feet of RS_485 communication chips U5 and the 16 of data processing module chips U4 Foot is connected, 5 feet of RS_485 communication chips U5 connect respectively one end of capacitance C19, one end of resistance R6, protector T3 one end, Ground connection, one end of the 6 feet difference connecting resistance R9 of RS_485 communication chips U5 and the one of resistance R15 are held in one end of protector T5 altogether The other end at end, resistance R9 is 3.3V power inputs, 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 chips altogether One end of the other end and resistance R18 of the 7 feet difference connecting resistance R6 of U5, 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 chips U5 are connected with the other end of capacitance C19, and it is 3.3V power inputs to hold altogether, and the 1 of communication port P7 Foot is grounded, and 2 feet connect one end of one end of wire jumper J1, one end of wire jumper J2 and capacitance 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 inputs, and the other end of capacitance C20 is grounded, 3 feet of communication port P7 with 29 feet of data processing module chips U4 are connected, 4 feet of communication port P7 and the 30 foot phases of data processing module chips U4 Even, the 5 feet ground connection of communication port P7.