CN201166913Y - Temperature transmitter - Google Patents
Temperature transmitter Download PDFInfo
- Publication number
- CN201166913Y CN201166913Y CNU2008200554021U CN200820055402U CN201166913Y CN 201166913 Y CN201166913 Y CN 201166913Y CN U2008200554021 U CNU2008200554021 U CN U2008200554021U CN 200820055402 U CN200820055402 U CN 200820055402U CN 201166913 Y CN201166913 Y CN 201166913Y
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- chip microcomputer
- temperature transmitter
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Abstract
The utility model discloses a temperature transmitter based on the micropower short-distance wireless network service technology. The temperature transmitter includes: a sensor component which comprises a sensor receiving a heat absorbing resistor input signal and/or a thermoelectric couple input signal and an analog switch used for converting the input signal of the sensor and self-calibrating zero; a signal conditioning circuit which is connected with the sensor component and comprises a difference amplifier used as the input stage of the signal conditioning circuit and a programmable amplifier; a control circuit which is connected with the signal conditioning circuit; a wireless communication circuit which bases on the wireless transport protocols and is connected with the control circuit in a bidirectional manner; and a battery used for supplying the electrical source. The provided temperature transmitter changes the signal wire transmission of the prior temperature transmitter into signal wireless transmission, and the integrated wiring cost is saved; and the power consumption is low, the anti-jamming performance is good, the networking is flexible and the configuration is fast and simple.
Description
Technical field
The utility model relates to a kind of temperature data acquisition and transmission system of industrial automation control, particularly a kind of temperature transmitter based on little power consumption short-range wireless networking communication technology.
Background technology
Transmitter is a kind of physical measurement signal or common electrical conversion of signals to be output of standard electric signal or the equipment that can export in the communications protocol mode, generally be divided into: temperature/humidity transmitter, pressure unit, differential pressure transmitter, fluid level transmitter, current transducer etc.Present temperature transmitter generally is made up of temperature probe (thermoelectricity is thermal resistance sensor occasionally) and two-wire system solid electronic unit.Adopt the solid modules form that temperature probe is directly installed in the terminal box, thereby form incorporate transmitter.
The user must be placed in transmitter each collection point for gathering information needed and cooperating microsystem or the use of other conventional instruments, and considers the comprehensive laying of power lead and data line, and the installation cost and the operation maintenance cost of this engineering are higher.
The utility model content
The purpose of this utility model provides a kind of temperature transmitter based on wireless transmission protocol, and it can be placed in anywhere and need not to lay power lead or data line, and low in energy consumption, anti-interference is high.
For solving the problems of the technologies described above, temperature transmitter of the present utility model comprises: a sensor module, and it includes the sensor of thermal-arrest resistance and/or thermocouple signal input and can be used for the conversion sensor input signal and the analog switch of self-correcting zero; One signal conditioning circuit that is connected with sensor module, it includes a differential amplifier, in order to input stage as described signal conditioning circuit, and a programmable amplifier; One control circuit that is connected with signal conditioning circuit; One radio communication circuit based on wireless transmission protocol, it is connected with control circuit is two-way; And in order to the battery of power supply to be provided.
As a kind of preferred version of the present utility model, described sensor module comprises that also one measures bridge circuit, and one provides the constant-current source circuit and a disconnected even holding circuit of power supply for bridge circuit.
As a kind of preferred version of the present utility model, described control circuit is the single-chip microcomputer of collection A/D conversion, microprocessor (MPU, MICRO PROCESSOR UNIT), power supply smart management, and this single-chip microcomputer carries a ring temperature measurement circuit; Also comprise one in order to low frequency oscillation circuit and that MPU low-power consumption frequency of operation is provided in order to the high frequency oscillation circuit of MPU normal working frequency to be provided.
As a kind of preferred version of the present utility model, described radio communication circuit receives and the emitting antenna circuit for the ZigBee signal.
As a kind of preferred version of the present utility model, described thermocouple signal is directly imported and is connected described analog switch, and described thermal resistance signal is connected with described analog switch by described bridge circuit; Described analog switch includes single-chip microcomputer U5, and the pin 7 of described single-chip microcomputer U5 is connected described differential amplifier with pin 15, and described differential amplifier includes amplifier U3C, and the pin 8 of described amplifier U3C connects described programmable amplifier; Described programmable amplifier includes single-chip microcomputer U4, and the pin 2 of described single-chip microcomputer U4 connects described control circuit; Described control circuit includes single-chip microcomputer U1, the pin 32 of described single-chip microcomputer U1, pin 33 and pin 34 be connected based on the radio communication circuit of ZigBee wireless transmission protocol is two-way.
Technique effect of the present utility model is to introduce the ZigBee wireless transmission protocol, changes the wire transmission of original temperature transducer signal into wireless transmission, has saved the cost of comprehensive wiring; And low in energy consumption, anti-interference is high, networking flexibility, configuration are quick.
Description of drawings
Below in conjunction with accompanying drawing and preferred implementation the utility model is described in further detail.
Fig. 1 is the circuit block diagram of the preferred implementation of the utility model temperature transmitter; And
Fig. 2 is the circuit theory diagrams of the preferred implementation of the utility model temperature transmitter.
Embodiment
As shown in Figure 1, the utility model temperature transmitter comprises a sensor module, and wherein, thermocouple signal 11 directly input is connected with analog switch 14, and thermal resistance signal 12 is connected with analog switch 14 by a bridge circuit 13; One signal conditioning circuit that is connected with sensor module, it comprises as a differential amplifier 21 of input stage and a programmable amplifier 22; One control circuit that is connected with signal conditioning circuit, it comprises one 14 A/D transition components 31, microprocessor 32 and power management 33; One with the two-way radio communication circuit that is connected of control circuit based on ZigBee wireless transmission protocol 4; And a reference voltage 5, it is the reference voltage source of described control circuit and described sensor module.
Please consult Fig. 2 simultaneously, described radio communication circuit based on ZigBee wireless transmission protocol 4 is made up of inductance L 1, L2, L3 and capacitor C 1; Wherein, an end of inductance L 1 ground connection of connecting with capacitor C 1, the other end of inductance L 1, inductance L 3 and inductance L 2 are connected with single-chip microcomputer U1 is two-way.
Described control circuit includes single-chip microcomputer U1, and the pin 9 of described single-chip microcomputer U1 meets power supply Vaa; Pin 16 and pin 18 ground connection; Pin 7 and pin 15 connect programmable amplifier 22; Pin 17 and pin 20 connect reference voltage 5; Pin 22 is by resistance R 2 ground connection; Pin 24, pin 25, pin 27～31, pin 35～40 are by capacitor C 5 ground connection; Pin 26 is by resistance R 1 ground connection; Pin 32, pin 33 and pin 34 are connected the radio communication circuit based on ZigBee wireless transmission protocol 4; Pin 42 is by capacitor C 2 ground connection; Pin 19 is connected the high frequency oscillation circuit with pin 21; Pin 43 is connected the low frequency oscillation circuit with pin 44; Wherein, described low frequency oscillation circuit is made up of capacitor C 3, C4 and crystal oscillator Y1, and described high frequency oscillation circuit is made up of capacitor C 7, C8 and crystal oscillator Y2.
In the present embodiment, the selected model of single-chip microcomputer U1 is CC2430.
Described reference voltage 5 includes single-chip microcomputer U2, and it is the may command work of low-power consumption or the reference voltage source of dormant state; Pin 5 ground connection of described single-chip microcomputer U2, pin 4 and pin 7 meet power supply Vref; Pin 4 also is connected with resistance R 3, R4, the R5 of series connection, in order to dividing potential drop.
In the present embodiment, the selected model of single-chip microcomputer U2 is ADR390.
Described programmable amplifier 22 is made up of single-chip microcomputer U4 and amplifier U3D; Wherein, the pin 3,6,11,14 of single-chip microcomputer U4 meets amplifier U3D, and pin 2 connects described control circuit, pin 5 ground connection, and pin 7 is by connecting resistance R9 ground connection, pin 10 connecting resistance R8, pin 15 connecting resistance R7; The pin 4 of amplifier U3D meets power supply Vaa, pin 11 ground connection, and pin 12 connects differential amplifier 21, pin 14 connection control circuits.
In the present embodiment, the selected model of single-chip microcomputer U4 is ADG711, and the selected model of amplifier U3D is AD8069.
Described differential amplifier 21 is made up of amplifier U3A, U3B, U3C and resistance R 10～R16; Wherein, the pin 4 of amplifier U3A meets power supply Vaa, pin 11 ground connection, and pin 3 connects analog switch 14, and pin 2 meets amplifier U3B by resistance R 10, and pin 1 meets amplifier U3C by resistance R 14; The pin 4 of amplifier U3B meets power supply Vaa, pin 11 ground connection, and pin 5 connects analog switch 14, and pin 7 meets amplifier U3C by resistance R 13; The pin 4 of amplifier U3C meets power supply Vaa, pin 11 ground connection, and pin 8 connects programmable amplifier 22; Resistance R 12, R11, R16 are parallel to amplifier U3A, U3B, U3C respectively.
In the present embodiment, amplifier U3A, U3B, the selected model of U3C are AD8069.
Described analog switch 14 is made up of single-chip microcomputer U5, is used for the measurement conversion of thermal resistance and thermopair and the measurement self-correcting zero of thermopair; Pin 5 ground connection of single-chip microcomputer U5 wherein, pin 13 meets power supply Vaa, and pin 2 connects thermocouple signal 11, and pin 3 connects disconnected even holding circuit, and pin 6 and pin 11 connect the measurement bridge circuit, and pin 7 connects differential amplifier 21, and pin 10 connects constant-current source circuit.
In the present embodiment, the selected model of single-chip microcomputer U5 is ADG711.
Described measurement bridge circuit is made up of resistance R 19, R20, R21, and resistance R 18 provides disconnected even safeguard measure.Described constant-current source circuit is made up of discharge circuit U6 and triode Q1, and it provides excitation power supply for described bridge circuit 13, can high speed turn-off and conducting; Wherein, the pin 1 of discharge circuit U6 meets triode Q1, pin 2 ground connection, and pin 3 connects reference voltage 5, and pin 4 is by resistance R 17 ground connection.
In the present embodiment, the selected model of discharge circuit U6 is ADA4851-1, and the selected model of triode Q1 is 2N2209.
Below the preferred embodiment of the invention is specified, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all modification that is equal to or replacement under the prerequisite of spirit of the present invention, modification that these are equal to or replacement all are included in the application's claim institute restricted portion.
Claims (5)
1. temperature transmitter comprises:
One sensor module, it includes the sensor of thermal-arrest resistance and/or thermocouple signal input and can be used for the conversion sensor input signal and the analog switch of self-correcting zero;
One signal conditioning circuit that is connected with sensor module, it includes a differential amplifier, in order to input stage as described signal conditioning circuit, and a programmable amplifier;
One control circuit that is connected with signal conditioning circuit;
One radio communication circuit based on wireless transmission protocol, it is connected with control circuit is two-way;
And in order to the battery of power supply to be provided.
2. temperature transmitter as claimed in claim 1 is characterized in that: described sensor module comprises that also one measures bridge circuit, and one provides the constant-current source circuit and a disconnected even holding circuit of power supply for bridge circuit.
3. temperature transmitter as claimed in claim 1, it is characterized in that: described control circuit is the single-chip microcomputer of set A/D conversion, microprocessor, power supply smart management, its also comprise one in order to low frequency oscillation circuit and that microprocessor low-power consumption frequency of operation is provided in order to the high frequency oscillation circuit of microprocessor normal working frequency to be provided.
4. temperature transmitter as claimed in claim 1 is characterized in that: described radio communication circuit receives and the emitting antenna circuit for the ZigBee signal.
5. as claim 1,2,3 or 4 described temperature transmitters, it is characterized in that: described thermocouple signal is directly imported and is connected described analog switch, and described thermal resistance signal is connected with described analog switch by described bridge circuit; Described analog switch includes single-chip microcomputer U5, and the pin 7 of described single-chip microcomputer U5 is connected described differential amplifier with pin 15, and described differential amplifier includes amplifier U3C, and the pin 8 of described amplifier U3C connects described programmable amplifier; Described programmable amplifier includes single-chip microcomputer U4, and the pin 2 of described single-chip microcomputer U4 connects described control circuit; Described control circuit includes single-chip microcomputer U1, the pin 32 of described single-chip microcomputer U1, pin 33 and pin 34 be connected based on the radio communication circuit of ZigBee wireless transmission protocol is two-way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200554021U CN201166913Y (en) | 2008-02-03 | 2008-02-03 | Temperature transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200554021U CN201166913Y (en) | 2008-02-03 | 2008-02-03 | Temperature transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201166913Y true CN201166913Y (en) | 2008-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200554021U Expired - Fee Related CN201166913Y (en) | 2008-02-03 | 2008-02-03 | Temperature transmitter |
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| Country | Link |
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| CN (1) | CN201166913Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161167A (en) * | 2011-01-21 | 2011-08-24 | 华南理工大学 | Method and device of wirelessly outputting thermoelectric force signal for multi-point temperature measuring of rotator |
| CN102620644A (en) * | 2012-03-15 | 2012-08-01 | 李建国 | Zigbee-based micro strain measurement unattended engineering monitoring system |
| CN102735362A (en) * | 2012-06-20 | 2012-10-17 | 北京遥测技术研究所 | Astronautic programmable thermocouple temperature transmitter |
| CN105444801A (en) * | 2014-08-27 | 2016-03-30 | 武汉普创数码科技有限公司 | High-temperature and low-power-consumption data acquisition device based on ZigBee |
| RU2760923C1 (en) * | 2020-12-24 | 2021-12-01 | Федеральное государственное бюджетное учреждение науки Институт автоматики и электрометрии Сибирского отделения Российской академии наук (ИАиЭ СО РАН) | Device for measuring small temperature differences |
-
2008
- 2008-02-03 CN CNU2008200554021U patent/CN201166913Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161167A (en) * | 2011-01-21 | 2011-08-24 | 华南理工大学 | Method and device of wirelessly outputting thermoelectric force signal for multi-point temperature measuring of rotator |
| CN102620644A (en) * | 2012-03-15 | 2012-08-01 | 李建国 | Zigbee-based micro strain measurement unattended engineering monitoring system |
| CN102620644B (en) * | 2012-03-15 | 2014-08-13 | 李建国 | Zigbee-based micro strain measurement unattended engineering monitoring system |
| CN102735362A (en) * | 2012-06-20 | 2012-10-17 | 北京遥测技术研究所 | Astronautic programmable thermocouple temperature transmitter |
| CN102735362B (en) * | 2012-06-20 | 2014-04-02 | 北京遥测技术研究所 | Astronautic programmable thermocouple temperature transmitter |
| CN105444801A (en) * | 2014-08-27 | 2016-03-30 | 武汉普创数码科技有限公司 | High-temperature and low-power-consumption data acquisition device based on ZigBee |
| RU2760923C1 (en) * | 2020-12-24 | 2021-12-01 | Федеральное государственное бюджетное учреждение науки Институт автоматики и электрометрии Сибирского отделения Российской академии наук (ИАиЭ СО РАН) | Device for measuring small temperature differences |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081217 Termination date: 20100203 |