CN211121366U

CN211121366U - Integrated single-bus temperature and humidity sensor

Info

Publication number: CN211121366U
Application number: CN202020096805.1U
Authority: CN
Inventors: 韩金涛; 屈铮辉; 冯师宾; 武昭阳
Original assignee: Zhengzhou Yuanchuang Intelligent Control Co ltd
Current assignee: Zhengzhou Banghai Intelligent Technology Co.,Ltd.; ZHENGZHOU YUANCHUANG INTELLIGENT CONTROL Co.,Ltd.
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2020-07-28
Anticipated expiration: 2030-01-16

Abstract

The utility model relates to an integrated single bus temperature and humidity sensor, which adopts the technical proposal that an air inlet pipe communicated with an inner cavity of a shell is arranged at the upper end of the shell, air holes communicated with the inside and the outside are arranged at the upper end of the air inlet pipe, a filter element covering the whole section of the air inlet pipe is filled in the air inlet pipe, a circuit board is provided with a control circuit, the control circuit comprises a power supply module, a CPU, a single bus communication module, a temperature and humidity detection module and a lead terminal module, the CPU is respectively connected with the power supply module, the single bus communication module, the temperature and humidity detection module and the lead terminal module, a detection window of the temperature and humidity sensor in the temperature and humidity detection module is positioned under the filter element, a row needle in the lead terminal module extends out of the shell, the temperature and humidity can be detected simultaneously, the filter, the detection failure is caused, the detection accuracy is high, and the performance is stable.

Description

Integrated single-bus temperature and humidity sensor

Technical Field

The utility model relates to a grain storage temperature and humidity measurement technical field, especially integration unibus temperature and humidity sensor.

Background

In order to ensure good quality of the grains during storage, the temperature, humidity, moisture and other data of each point in the grains need to be detected. And analyzing according to the detected data so as to select a proper mode to adjust the grain storage environment.

The existing detection equipment has the following defects:

1. The detection function is single: at present, a temperature measuring cable is generally used for detecting grain condition parameters in a grain depot, and a sensor in the temperature measuring cable can only detect temperature data;

2. The moisture detection is complex: the current commonly used moisture detector has complex operation, long time consumption and inconvenient sampling.

Therefore, improvement and innovation thereof are imperative.

SUMMERY OF THE UTILITY MODEL

To above-mentioned condition, for overcoming prior art's defect, the utility model aims at providing an integration unibus temperature and humidity sensor, can effectively solve grain temperature and humidity measurement's problem.

The utility model provides a technical scheme be:

The utility model provides an integration monobus temperature and humidity sensor, including shell and the circuit board of dress in the shell, the shell upper end is provided with the intake pipe that is linked together rather than the inner chamber, open the bleeder vent that has inside and outside to link up on the intake pipe, the intake pipe intussuseption is filled with and covers its full sectional filter core, the circuit board is equipped with control circuit, control circuit includes power module, CPU, monobus communication module, temperature and humidity detection module and lead terminal module, CPU respectively with power module, monobus communication module, temperature and humidity detection module and lead terminal module link to each other, temperature and humidity detection module's temperature and humidity sensor's detection window is located the filter core under, the row's needle in the lead terminal.

Preferably, the shell is a hollow integrated structure formed by vertically splicing an upper shell and a lower shell, the air inlet pipe is vertically fixed at the center of the top of the upper shell, the circuit board is horizontally fixed in the lower shell, and the pin header extends out of the shell from the lower end of the lower shell.

The CPU comprises a chip U1, wherein 4 pins of a chip U1 are connected with one end of a capacitor C1, the common end of the chip U1 is grounded, 5 pins of the chip U1 are connected with the other end of the capacitor C1, the common end of the chip U1 is connected with a 2.5V power output end of a power module, 1 pin and 20 pins of a chip U1 are connected with a lead terminal module, 10 pins and 13 pins of a chip U1 are connected with a single bus communication module, and 15 pins and 16 pins of the chip U1 are connected with a temperature and humidity detection module.

Preferably, the power module includes a three-terminal regulator U2, pin 1 of the three-terminal regulator U2 is connected to the negative electrode of the electrode capacitor C5, the positive electrode of the diode T2 and the negative electrode of the electrode capacitor C3, the common terminal is grounded, pin 2 of the three-terminal regulator U2 is connected to the positive electrode of the electrode capacitor C3, the common terminal is used as a 2.5V power output terminal and is connected to pin 5 of the chip U1 and the temperature and humidity detection module, pin 3 of the three-terminal regulator U2 is connected to the positive electrode of the electrode capacitor C5, the negative electrode of the diode T2 and one end of the fuse F1, the other end of the fuse F1 is connected to the negative electrode of the diode D2 and the negative electrode of the diode D1, the positive electrode of the diode D2 is connected to the lead terminal module and is used as a power input terminal, and the positive electrode of the diode D1.

Preferably, the temperature and humidity detection module includes a temperature and humidity sensor U3, pin 1 of the temperature and humidity sensor U3 is connected to one end of a resistor R2, and is commonly connected to pin 15 of a chip U1, pin 6 of the temperature and humidity sensor U3 is connected to one end of a resistor R3, and is commonly connected to pin 16 of a chip U1, pin 5 of the temperature and humidity sensor U3 is respectively connected to one end of a capacitor C6, the other end of a resistor R2, and the other end of the resistor R3, and is commonly connected to a 2.5V power output end of the power module, and pin 2 of the temperature and humidity sensor U3 is connected to the other end of the capacitor C6, and the common end is grounded.

Preferably, the single-bus communication module includes a field effect transistor Q1 and a transient suppression diode T1, a gate of the field effect transistor Q1 is connected to a pin 13 of the chip U1, a source of the field effect transistor Q1 is connected to one end of a resistor R1 and a cathode of the transient suppression diode T1, a common terminal is connected to the pin terminal module, the other end of the resistor R1 is connected to one end of a capacitor C2, the common terminal is connected to a pin 10 of the chip U1, a drain of the field effect transistor Q1 is connected to one end of a capacitor C2 and an anode of the transient suppression diode T1, and the common terminal is grounded.

Preferably, the lead terminal module comprises 5 groups of pins P1, P2, P3, P4 and P5, the pin P1 is connected with the anode of the diode D2 in the power supply module, the pin P2 is respectively connected with the anode of the diode D1 in the power supply module and the source of the fet Q1 in the single-bus communication module, the pin P3 is grounded, the pin P4 is connected with 20 pins of the chip U1 in the CPU, and the pin P5 is connected with 1 pin of the chip U1 in the CPU.

The utility model discloses novel structure is unique, and is simple reasonable, easy production, low cost, through last, the encapsulation that can accomplish the sensor is assembled to the casing down, the integrated level is high, small in size, the leakproofness is good, be convenient for secondary encapsulation, can detect temperature and humidity simultaneously, thereby can calculate out the moisture of grain through the temperature and the humidity data that detect, need not to advance the storehouse sample detection, can obtain relevant moisture data, adopt the single bus communication technique, can satisfy and be compatible each other with the sensor in the traditional temperature measuring cable, and set up the filter core in temperature and humidity sensor top, a dust for in the filtered air, in order to avoid blockking up temperature and humidity sensor's detection window, cause the detection inefficacy, the detection accuracy is high, stable performance, high durability and convenient use, and high effect, be the innovation on the grain temperature and humidity check out equipment, good society and economic benefits.

Drawings

Figure 1 is a perspective view of the present invention.

Fig. 2 is a sectional view of the present invention.

Fig. 3 is an exploded view of the present invention.

Fig. 4 is a perspective view of the upper case of the present invention.

Fig. 5 is a perspective view of the filter element of the present invention.

Fig. 6 is a perspective view of the lower case of the present invention.

Fig. 7 is a schematic diagram of the circuit of the present invention.

Fig. 8 is a schematic circuit diagram of the power module of the present invention.

Fig. 9 is a schematic circuit diagram of the CPU of the present invention.

Fig. 10 is a schematic circuit diagram of the single-bus communication module according to the present invention.

Fig. 11 the utility model discloses temperature and humidity detection module's circuit schematic diagram.

Fig. 12 is a schematic circuit diagram of the lead terminal module of the present invention.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.

By figure 1-12, the utility model discloses a shell and circuit board 3 of dress in the shell, the shell upper end is provided with the intake pipe 5 that is linked together rather than the inner chamber, open the bleeder vent 501 that link up inside and outside intake pipe 5 upper end, the intussuseption of intake pipe 5 is filled with and covers its full section filter core 4, circuit board 3 is equipped with control circuit, control circuit includes power module, CPU, the single bus communication module, temperature and humidity detection module and lead terminal module, CPU respectively with power module, the single bus communication module, temperature and humidity detection module and lead terminal module link to each other, temperature and humidity sensor 302's in temperature and humidity detection module detection window is located filter core 4 under, row's needle 303 among the lead terminal module stretches out the shell.

In order to guarantee the using effect, the shell is a hollow integrated structure formed by assembling the upper shell 1 and the lower shell 2 together, the air inlet pipe 5 is vertically fixed at the center of the top of the upper shell 1, the circuit board 3 is horizontally fixed in the lower shell 2, and the pin header 303 extends out of the shell from the lower end of the lower shell.

The lower end of the upper shell 1 is connected with a limiting convex edge 101 corresponding to the upper opening of the lower shell, after the upper shell 1 and the lower shell 2 are assembled together from top to bottom, the limiting convex edge 101 is clamped in the upper opening of the lower shell, and a first limiting structure of the upper shell and the lower shell is formed.

The two sides of the upper shell 1 are connected with connecting plates 6 extending downwards, the connecting plates 6 are provided with clamping grooves 601, the two side walls of the upper end of the lower shell 2 are fixed with buckles 7 corresponding to the clamping grooves, and when the upper shell 1 and the lower shell 2 are assembled together up and down, the buckles 7 are clamped in the clamping grooves 601 to form a second limiting structure of the upper shell and the lower shell.

the CPU is used for communicating with each module, processing data and the like, a chip U1 is an STM8 series single chip microcomputer (301 in fig. 2), VCC and GND ports (5 pins and 4 pins) are used for supplying power to the single chip microcomputer U1, SWIM and RST ports (20 pins and 1 pin) are used for downloading supporting software by the single chip microcomputer, SDA and SC L ports (15 pins and 16 pins) are used for communicating with a temperature and humidity sensor U3(302) and collecting temperature and humidity data, and CH1_ I and CH1_ L ports (10 pins and 13 pins) are used for detecting input signals and outputting low level control.

The power supply module comprises a three-terminal regulator U2, a pin 1 of the three-terminal regulator U2 is connected with a cathode of a pole capacitor C5, an anode of a diode T2 and a cathode of a pole capacitor C3 respectively, the common end of the three-terminal regulator U2 is connected with an anode of a pole capacitor C3, the common end of the three-terminal regulator U2 is used as a 2.5V power supply output end and is connected with a pin 5 of a chip U1 and a temperature and humidity detection module respectively, a pin 3 of the three-terminal regulator U2 is connected with an anode of a pole capacitor C5, a cathode of a diode T2 and one end of a fuse F1 respectively, the other end of the fuse F1 is connected with a cathode of a diode D2 and a cathode of a diode D1 respectively, an anode of a diode D2 is connected with a lead terminal module and is used as a power supply input end, and an anode of.

The module is used for providing a 2.5V power supply for the whole circuit and consists of a protection part and a voltage stabilization part. The protection part consists of diodes D1, D2, a fuse F1 and a diode T2, and the diodes D1 and D2 are used for preventing the reverse connection of a power supply from damaging a rear-stage circuit; the fuse F1 plays a role in limiting current for the self-recovery fuse, and prevents the output current from being overlarge and damaging other elements when in short circuit; the diode T2 is a TVS tube, and prevents the external interface from generating transient high voltage to damage the circuit under the conditions of human body touch, misoperation and the like. The voltage stabilizing part consists of active capacitors C5 and C3 and a three-terminal regulator U2, wherein the active capacitors C5 and C3 are used as filter capacitors, are filtered by the active capacitor C5 and then are stabilized by the three-terminal regulator U2, and are filtered by the active capacitor C3 and then are output to the circuit for power supply. The three-terminal regulator is a commercial product, and for example, a three-terminal regulator with the model number of XC6214P332PR can be adopted.

The temperature and humidity detection module comprises a temperature and humidity sensor U3, wherein a pin 1 of the temperature and humidity sensor U3 is connected with one end of a resistor R2, the pin is connected with a pin 15 of a chip U1 in common, a pin 6 of the temperature and humidity sensor U3 is connected with one end of a resistor R3 in common, the pin 16 of the chip U1 in common is connected in common, a pin 5 of the temperature and humidity sensor U3 is connected with one end of a capacitor C6, the other end of the resistor R2 and the other end of the resistor R3 in common, the pin 2 of the temperature and humidity sensor U3 is connected with the other end of the capacitor C6 in common, and the pin 2 is grounded.

The temperature and humidity detection module U3 is used for detecting temperature and humidity, collecting grain temperature and humidity data and transmitting the detected data to the chip U1 (the single chip microcomputer 301), and comprises a temperature and humidity sensor U3, resistors R2 and R3 are used as pull-up resistors, and a capacitor C6 is used as a filter capacitor; an I2C communication mode is adopted between the temperature and humidity sensor U3 and the chip U1, and the temperature and humidity sensor U3 is a market product, such as a temperature and humidity sensor manufactured by SENSITION corporation and having the model number of SHT 20.

The single-bus communication module comprises a field effect transistor Q1 and a transient suppression diode T1, the grid of the field effect transistor Q1 is connected with a pin 13 of a chip U1, the source of the field effect transistor Q1 is connected with one end of a resistor R1 and the negative electrode of the transient suppression diode T1 respectively, the common end of the field effect transistor Q1 is connected with a lead terminal module, the other end of the resistor R1 is connected with one end of a capacitor C2, the common end of the resistor R1 is connected with a pin 10 of a chip U1, the drain of the field effect transistor Q1 is connected with one end of a capacitor C2 and the positive electrode of the transient suppression diode T1 respectively.

The single-bus communication module is used for communication between the sensor and external equipment, and can be compatible with the sensor in the traditional temperature measuring cable. The capacitor C2 serves as a filter capacitor.

The lead terminal module comprises 5 groups of pin headers P1, P2, P3, P4 and P5, a pin header P1 is connected with the anode of a diode D2 in the power supply module, a pin header P2 is respectively connected with the anode of the diode D1 in the power supply module and the source of a field effect transistor Q1 in the single-bus communication module, the pin header P3 is grounded, a pin header P4 is connected with 20 pins of a chip U1 in a CPU, and a pin header P5 is connected with 1 pin of the chip U1 in the CPU.

The pin header P1-P5 is a lead terminal (pin header 303), VCC (pin header P1) and GND (pin header P3) are respectively output and connected to corresponding homonymous input ends of the power module, DQ (pin header P2) is connected to the single bus communication module for communication, and is also connected to the DQ input end of the power module for providing power for the module during two-wire system communication. The SWIM (pin header P4) and RST (pin header P5) ports connect to the CPU module.

The utility model discloses during the use, fix the circuit board in the lower casing, row's needle 303 pin passes the lower casing bottom and wears out for outside wiring, and pour into casting glue (like epoxy electronic casting glue) in the lower casing, bury circuit board 3 into casting glue, only expose the detection window of upper half of temperature and humidity sensor 302, play anticorrosive action, then put together upper casing and lower casing from top to bottom, the detection window of temperature and humidity sensor 302 is located the filter core under this moment, it has the bleeder vent to reserve in the intake pipe, outside air passes through the bleeder vent and gets into in the shell, make temperature and humidity sensor 302 detection window and external environment contact, be used for detecting outside air humidity, the filter core is PE sintering filter core, be used for filtering the dust in the air (not absorbing moisture), in order to avoid blockking up temperature and humidity sensor's detection window, cause the detection inefficacy; compared with the prior art, the utility model has novel and unique structure, simplicity, reasonability, easy production and low cost, the sensor can be packaged by assembling the upper and lower shells, the integration level is high, the volume is small, the sealing performance is good, the secondary packaging is convenient, the temperature and the humidity can be detected simultaneously, therefore, the moisture of the grain can be calculated through the detected temperature and humidity data without the need of warehousing, sampling and detecting, the related moisture data can be obtained, the compatibility with the sensor in the traditional temperature measuring cable can be met by adopting the single bus communication technology, and set up the filter core above the temperature and humidity sensor for dust in the filtered air to avoid blockking up the detection window of temperature and humidity sensor, cause and detect inefficacy, detection accuracy is high, and the stable performance, convenient to use, it is effectual, is the innovation on the grain temperature and humidity check out test set, has good society and economic benefits.

Claims

1. The utility model provides an integration monobus temperature and humidity sensor, circuit board (3) in shell including the shell with adorning, a serial communication port, shell upper end is provided with intake pipe (5) rather than the inner chamber and is linked together, intake pipe (5) upper end is opened has inside and outside bleeder vent (501) of lining up, intake pipe (5) intussuseption is filled with and is covered its full sectional filter core (4), circuit board (3) are equipped with control circuit, control circuit includes power module, CPU, monobus communication module, temperature and humidity detection module and lead terminal module, CPU respectively with power module, monobus communication module, temperature and humidity detection module and lead terminal module link to each other, the detection window of temperature and humidity sensor (302) in temperature and humidity detection module is located filter core (4) under, row's needle (303) in the lead terminal module stretch out the.

2. The integrated single-bus temperature and humidity sensor according to claim 1, wherein the housing is a hollow integrated structure formed by vertically assembling an upper housing (1) and a lower housing (2), the air inlet pipe (5) is vertically fixed at the top center of the upper housing (1), the circuit board (3) is horizontally fixed in the lower housing (2), and the pin header (303) extends out of the housing from the lower end of the lower housing.

3. The integrated single-bus temperature and humidity sensor according to claim 2, wherein the lower end of the upper shell (1) is connected with a limiting convex edge (101) corresponding to the upper opening of the lower shell, and after the upper shell (1) and the lower shell (2) are vertically assembled together, the limiting convex edge (101) is clamped in the upper opening of the lower shell to form a first limiting structure of the upper shell and the lower shell.

4. The integrated single-bus temperature and humidity sensor according to claim 2, wherein two sides of the upper shell (1) are connected with connecting plates (6) extending downwards, the connecting plates (6) are provided with clamping grooves (601), two side walls of the upper end of the lower shell (2) are fixed with buckles (7) corresponding to the clamping grooves, and when the upper shell (1) and the lower shell (2) are assembled together from top to bottom, the buckles (7) are clamped in the clamping grooves (601) to form a second limiting structure of the upper shell and the lower shell.

5. The integrated single-bus temperature and humidity sensor as claimed in claim 1, wherein the CPU comprises a chip U1, wherein 4 pins of the chip U1 are connected to one end of a capacitor C1, the common end is grounded, 5 pins of the chip U1 are connected to the other end of a capacitor C1, the common end is connected to a 2.5V power output end of a power module, 1 pin and 20 pins of the chip U1 are connected to lead terminal modules, 10 pins and 13 pins of the chip U1 are connected to a single-bus communication module, and 15 pins and 16 pins of the chip U1 are connected to a temperature and humidity detection module.

6. The integrated single-bus temperature and humidity sensor according to claim 5, the power supply module comprises a three-terminal regulator U2, a pin 1 of the three-terminal regulator U2 is connected with a cathode of a pole capacitor C5, an anode of a diode T2 and a cathode of a pole capacitor C3 respectively, the common end of the three-terminal regulator U2 is connected with an anode of a pole capacitor C3, the common end of the three-terminal regulator U2 is used as a 2.5V power supply output end and is connected with a pin 5 of a chip U1 and a temperature and humidity detection module respectively, a pin 3 of the three-terminal regulator U2 is connected with an anode of a pole capacitor C5, a cathode of a diode T2 and one end of a fuse F1 respectively, the other end of the fuse F1 is connected with a cathode of a diode D2 and a cathode of a diode D1 respectively, an anode of a diode D2 is connected with a lead terminal module and is used as a power supply input end, and an anode of.

7. The integrated single-bus temperature and humidity sensor as claimed in claim 6, wherein the temperature and humidity detection module comprises a temperature and humidity sensor U3, pin 1 of the temperature and humidity sensor U3 is connected with one end of a resistor R2 and is commonly connected with pin 15 of a chip U1, pin 6 of the temperature and humidity sensor U3 is connected with one end of a resistor R3 and is commonly connected with pin 16 of a chip U1, pin 5 of the temperature and humidity sensor U3 is respectively connected with one end of a capacitor C6, the other end of a resistor R2 and the other end of the resistor R3, the common end of the temperature and humidity sensor U3 is connected with the other end of the capacitor C6, and the common end of the temperature and humidity sensor U3 is grounded.

8. The integrated single-bus temperature and humidity sensor as claimed in claim 6, wherein the single-bus communication module comprises a field effect transistor Q1 and a transient suppression diode T1, a gate of the field effect transistor Q1 is connected to a pin 13 of a chip U1, a source of the field effect transistor Q1 is respectively connected to one end of a resistor R1 and a cathode of the transient suppression diode T1, a common terminal is connected to the terminal block, the other end of the resistor R1 is connected to one end of a capacitor C2, the common terminal is connected to a pin 10 of the chip U1, a drain of the field effect transistor Q1 is respectively connected to one end of a capacitor C2 and an anode of the transient suppression diode T1, and the common terminal is grounded.

9. The integrated single-bus temperature and humidity sensor as claimed in claim 8, wherein the lead terminal module comprises 5 sets of pins P1, P2, P3, P4 and P5, the pin P1 is connected to the anode of the diode D2 in the power module, the pin P2 is respectively connected to the anode of the diode D1 in the power module and the source of the fet Q1 in the single-bus communication module, the pin P3 is grounded, the pin P4 is connected to the 20 pins of the chip U1 in the CPU, and the pin P5 is connected to the 1 pin of the chip U1 in the CPU.