CN207215304U - A kind of multichannel temperature Acquisition Circuit - Google Patents
A kind of multichannel temperature Acquisition Circuit Download PDFInfo
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- CN207215304U CN207215304U CN201721086380.0U CN201721086380U CN207215304U CN 207215304 U CN207215304 U CN 207215304U CN 201721086380 U CN201721086380 U CN 201721086380U CN 207215304 U CN207215304 U CN 207215304U
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Abstract
It the utility model is related to a kind of multichannel temperature Acquisition Circuit.Including：Multiple temperature sensors, ADC sample circuits, gate control circuit, temperature collection circuit, wherein, ADC sample circuits include multiple sensor interfaces for being used to connect temperature sensor, and temperature sensor connects ADC sample circuits by sensor interface；Gate control circuit connects ADC sample circuits, for exporting gate control signal to ADC sample circuits, to control the gating of temperature sensor；Temperature collection circuit connects ADC sample circuits, for induced-current caused by collecting temperature sensor, and then calculates the temperature of temperature sensor sensing.By implementing the utility model, multiple temperature acquisitions can be realized by monolithic ADC chips, design is simple, equipment volume is small, cost is low.
Description
Technical field
Temperature sensing arts are the utility model is related to, more specifically to a kind of multichannel temperature Acquisition Circuit.
Background technology
In temperature acquisition equipment, temperature sensor is a temperature-sensitive resistor, it is necessary to be carried out using a constant-current source
Driving, the voltage at sensor both ends of then reading back, by the way that measured temperature is calculated.During collecting temperature, generally
All it is the ADC chips sampled using integrated a constant-current source and AD.By constant-current source actuation temperature sensitive resistance, then using piece
Subset into AD channel sample reference resistances both ends voltage, then calculate temperature value.
If need to gather multiple temperature values with an equipment, then just need to design multiple temperature collection circuits.But often
Acquisition chip, mostly an only constant-current source and an AD sampling.If same equipment needs to gather multiple temperature values,
Multiple temperature collection circuits so can only be individually designed, i.e., repeatedly.Cause that equipment cost is high, design difficulty is big, product
Volume is big and multiple defects such as central processing unit peripheral resources deficiency.
Utility model content
The technical problems to be solved in the utility model is, for prior art above-mentioned multiple temperature acquisitions when can only letter
Single design iterations, cause the defects of volume is big, cost is high, there is provided a kind of multichannel temperature Acquisition Circuit.
Technical scheme is used by the utility model solves its technical problem：Construct a kind of multichannel temperature collection electricity
Road, including：Multiple temperature sensors, ADC sample circuits, gate control circuit, temperature collection circuit, wherein,
The ADC sample circuits include multiple sensor interfaces for being used to connect the temperature sensor, and the temperature passes
Sensor connects the ADC sample circuits by the sensor interface；
The gate control circuit connects the ADC sample circuits, is sampled for exporting gate control signal to the ADC
Circuit, to control the gating of the temperature sensor；
The temperature collection circuit connects the ADC sample circuits, for gathering sensing caused by the temperature sensor
Electric current, and then calculate the temperature of the temperature sensor sensing.
Preferably, multichannel temperature Acquisition Circuit described in the utility model, the ADC sample circuits include：With more
The multiway analog switch selection circuit of individual analog switch, the gate control circuit connect the multiway analog switch selection circuit
Input, input gate control signal；Multiple temperature sensors connect the multiway analog switch selection circuit respectively
Each road output end；
The multiway analog switch selection circuit beats ON/OFF according to the gate control signal control analog switch
Close, and then control the gating of the temperature sensor.
Preferably, multichannel temperature Acquisition Circuit described in the utility model, the gate control circuit include：For producing
Life enables the enabled circuit of analog switch signal, the first gating circuit for producing the first address gating signal, for producing
Second gating circuit of the second address gating signal；
The enabled circuit, the first gating circuit, the second gating circuit connect the input of the ADC sample circuits respectively
End, the ADC sample circuits are according to enabled analog switch signal, the first address gating signal and second address strobe
Signal controls the gating of the analog switch.
Preferably, multichannel temperature Acquisition Circuit described in the utility model, the ADC sample circuits are
MAX14778ETP chips.
Preferably, multichannel temperature Acquisition Circuit described in the utility model, described in the enabled circuit connection
The pin 10 and pin 16 of MAX14778ETP chips, input the enabled analog switch signal；The first gating circuit connection
The pin 11 and pin 15 of the MAX14778ETP chips, input first address gating signal；Second gating circuit
The pin 12 and pin 14 of the MAX14778ETP chips are connected, inputs second address gating signal.
Preferably, multichannel temperature Acquisition Circuit described in the utility model, the I/O mouths of the MAX14778ETP chips
For connecting the temperature sensor.
Preferably, multichannel temperature Acquisition Circuit described in the utility model, the temperature collection circuit include
ADS1247IPWR chips.
Preferably, multichannel temperature Acquisition Circuit described in the utility model, the pin 5 of the MAX14778ETP chips
Connect the pin 9 and pin 10 of the ADS1247IPWR chips, the pins 1 of the MAX14778ETP chips connects described
The pin 11 and pin 12 of ADS1247IPWR chips, the pin 1 of the MAX14778ETP chips connect reference resistance R246's
One end, the other end ground connection of the reference resistance R246；
The direct current electricity output of the MAX14778ETP chips output is to the reference resistance R246, by gathering the ginseng
The voltage at resistance R246 both ends is examined, calculates the temperature of the temperature sensor sensing.
Preferably, multichannel temperature Acquisition Circuit described in the utility model, the pin 5 of the ADS1247IPWR chips
One end of the reference resistance R246 is connected, the pin 6 of the ADS1247IPWR chips connects the reference resistance R246's
The other end.
Preferably, multichannel temperature Acquisition Circuit described in the utility model, the pin 5 of the ADS1247IPWR chips
By resistance R245 connections reference resistance R246 one end, the pin 6 of the ADS1247IPWR chips passes through resistance
The R247 connections reference resistance R246 other end；
The pin that the pin 5 of the MAX14778ETP chips passes through the resistance R240 connections ADS1247IPWR chips
10, the pin 11 that the pins 1 of the MAX14778ETP chips passes through the resistance R244 connections ADS1247IPWR chips.
Implement a kind of multichannel temperature Acquisition Circuit of the present utility model, have the advantages that：Including：Multiple temperature
Sensor, ADC sample circuits, gate control circuit, temperature collection circuit, wherein, ADC sample circuits include multiple for connecting
The sensor interface of jointing temp sensor, temperature sensor connect ADC sample circuits by sensor interface；Gate control circuit
ADC sample circuits are connected, for exporting gate control signal to ADC sample circuits, to control the gating of temperature sensor；Temperature
Acquisition Circuit connects ADC sample circuits, for induced-current caused by collecting temperature sensor, and then calculates TEMP
The temperature of device sensing.By implementing the utility model, multiple temperature acquisitions can be realized by monolithic ADC chips, design is simple, sets
Standby small volume, cost are low.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing：
Fig. 1 is a kind of structural representation of multichannel temperature Acquisition Circuit of the utility model；
Fig. 2 is the circuit diagram of ADC sample circuits in a kind of multichannel temperature Acquisition Circuit of the utility model；
Fig. 3 is the circuit diagram of temperature collection circuit in a kind of multichannel temperature Acquisition Circuit of the utility model.
Embodiment
In order to which the technical characteristics of the utility model, purpose and effect are more clearly understood, it is detailed now to compare accompanying drawing
Illustrate specific embodiment of the present utility model.
Fig. 1 is a kind of structural representation of multichannel temperature Acquisition Circuit of the utility model.
Specifically, the multichannel temperature Acquisition Circuit, including：Multiple temperature sensors 10, ADC sample circuits 20, gating
Control circuit 30, temperature collection circuit 40, wherein,
ADC sample circuits 20 include multiple sensor interfaces for being used to connect temperature sensor 10, and temperature sensor 10 is logical
Cross sensor interface connection ADC sample circuits 20.
Gate control circuit 30 connects ADC sample circuits 20, for exporting gate control signal to ADC sample circuits 20,
To control the gating of temperature sensor 10.
Temperature collection circuit 40 connects ADC sample circuits 20, for induced-current caused by collecting temperature sensor 10, enters
And calculate the temperature of the sensing of temperature sensor 10.
Further, ADC sample circuits 20 include：Multiway analog switch selection circuit 201 with multiple analog switches, choosing
Logical control circuit 30 connects the input of multiway analog switch selection circuit 201, inputs gate control signal；Multiple TEMPs
Device 10 connects each road output end of multiway analog switch selection circuit 201 respectively.Multiway analog switch selection circuit 201 is according to choosing
Logical control signal control analog switch beats opening/closing, and then controls the gating of temperature sensor 10.ADC sample circuits 20 have
Two constant-current source outputs：One reaches reference resistance by temperature sensor 10, and one flows directly into reference resistance.Then pass through
The voltage at sample reference resistance both ends, you can calculate the resistance value of temperature sensor 10, and then the temperature value of sampling can be calculated.
Further, gate control circuit 30 includes：For producing the enabled circuit of enabled analog switch signal, for producing
First gating circuit of the first address gating signal, the second gating circuit for producing the second address gating signal.Enabled electricity
Road, the first gating circuit, the second gating circuit connect the input of ADC sample circuits 20 respectively.ADC sample circuits 20 are according to making
The gating of energy analog switch signal, the first address gating signal and the second address gating signal control analog switch.
Need what is illustrated, enabled analog switch signal can include multiple enable signals, and each enable signal coordinates first
What address gating signal and the second address gating signal can control analog switch beats opening/closing.For example, enabled analog switch signal
Comprising 1 enable signal, the first address gating signal and the second address gating signal can produce 4 control letters according to low and high level
Number, so, it now can control the gating of 4 temperature sensors 10.In another example enabled analog switch signal includes 2 enabled letters
Number, the first address gating signal and the second address gating signal can produce 4 control signals according to low and high level, so, now
It can control the gating of 8 temperature sensors 10.In another example enabled analog switch signal includes 3 enable signals, the choosing of the first address
Messenger and the second address gating signal can produce 4 control signals according to low and high level, so, it now can control 12 temperature
The gating of sensor 10.By that analogy, it is of the present utility model temperature sensor 10 to be controlled by changing the realization of enable signal
The change of quantity processed.
Fig. 2 and Fig. 3 is preferred embodiment of the present utility model.
Fig. 2 is the circuit diagram of ADC sample circuits 20 in a kind of multichannel temperature Acquisition Circuit of the utility model.
With reference to figure 2, now illustrate and above-mentioned principle is illustrated.Enabled analog switch signal includes 1 enable signal, i.e.,
CH1_EN signals are height.First address gating signal and the second address gating signal are binary signal, i.e. CH1_1A0 and CH1_
1A1 be 00,01,10,11 4 kind of situation, then can control 4 temperature sensors 10.
When CH1_1A0 and CH1_1A1 is 00, what is gated respectively is that A0 is connected to ACOM (A channel common port), and B0 is connected to
BCOM (channel B common port)；
When CH1_1A0 and CH1_1A1 is 01, what is gated respectively is that A1 is connected to ACOM (A channel common port), and B1 is connected to
BCOM (channel B common port)；
When CH1_1A0 and CH1_1A1 is 10, what is gated respectively is that A2 is connected to ACOM (A channel common port), and B2 is connected to
BCOM (channel B common port)；
When CH1_1A0 and CH1_1A1 is 11, what is gated respectively is that A3 is connected to ACOM (A channel common port), and B3 is connected to
BCOM (channel B common port).
Preferably, in multichannel temperature Acquisition Circuit of the present utility model, ADC sample circuits 20 are MAX14778ETP
Chip.
Specifically, the pin 10 and pin 16 of enabled circuit connection MAX14778ETP chips, input enabled analog switch letter
Number；First gating circuit connects the pin 11 and pin 15 of MAX14778ETP chips, inputs the first address gating signal；Second
Gating circuit connects the pin 12 and pin 14 of MAX14778ETP chips, inputs the second address gating signal.
Further, the I/O mouths of MAX14778ETP chips are used to connect temperature sensor 10.Specifically, for
MAX14778ETP chips, temperature sensor 10 is connected between the pin 6 and pin 20 of MAX14778ETP chips,
Temperature sensor 10, the He of pin 8 of MAX14778ETP chips are connected between the pin 7 and pin 19 of MAX14778ETP chips
Temperature sensor 10 is connected between pin 18, temperature sensor is connected between the pin 9 and pin 17 of MAX14778ETP chips
10.It is appreciated that when the number change of analog switch, the connection that the present embodiment is adjusted temperature sensor 10 is referred to.
Further, pin 10 of the circuit by resistance R575 connection MAX14778ETP chips is enabled, enabled circuit passes through electricity
Hinder the pin 16 of R576 connection MAX14778ETP chips；First gating circuit passes through resistance R571 connection MAX14778ETP cores
The pin 11 of piece, the pin 15 that the first gating circuit passes through resistance R571 connection MAX14778ETP chips；Second gating circuit
By the pin 12 of resistance R572 connection MAX14778ETP chips, the second gating circuit is connected by resistance R572
The pin 14 of MAX14778ETP chips.
Fig. 3 is the circuit diagram of temperature collection circuit 40 in a kind of multichannel temperature Acquisition Circuit of the utility model.
Specifically, multichannel temperature Acquisition Circuit of the present utility model, temperature collection circuit 40 includes ADS1247IPWR
Chip.
The pin 5 of the MAX14778ETP chips connects the pin 9 and pin 10 of ADS1247IPWR chips,
The pin 1 of MAX14778ETP chips connects the pin 11 and pin 12 of ADS1247IPWR chips, MAX14778ETP chips
Pin 1 connects reference resistance R246 one end, reference resistance R246 other end ground connection；MAX14778ETP chips export straight
Electricity output is flowed to reference resistance R246, by gathering the voltage at reference resistance R246 both ends, is calculated temperature sensor 10 and is sensed
Temperature.
Preferably, multichannel temperature Acquisition Circuit of the present utility model, the connection reference of pin 5 of ADS1247IPWR chips
Resistance R246 one end, the pin 6 of ADS1247IPWR chips connect the reference resistance R246 other end.
Preferably, multichannel temperature Acquisition Circuit of the present utility model, the pin 5 of ADS1247IPWR chips pass through resistance
R245 connection reference resistances R246 one end, the pin 6 of ADS1247IPWR chips pass through resistance R247 connection reference resistances R246
The other end.
The pin 5 of MAX14778ETP chips by the pins 10 of resistance R240 connection ADS1247IPWR chips,
The pin 11 that the pin 1 of MAX14778ETP chips passes through resistance R244 connection ADS1247IPWR chips.
By implementing the utility model, time division multiplexing can be used, multiple temperature acquisitions are realized by monolithic ADC chips, if
Meter is simple, equipment volume is small, cost is low.
For above example only to illustrate technical concepts and features of the present utility model, its object is to allow be familiar with technique
Personage can understand content of the present utility model and implement accordingly, the scope of protection of the utility model can not be limited.It is all with
The equivalent changes and modifications that the utility model claims scope is done, all should belong to the utility model claims covers model
Enclose.
Claims (10)
- A kind of 1. multichannel temperature Acquisition Circuit, it is characterised in that including：Multiple temperature sensors (10), ADC sample circuits (20), gate control circuit (30), temperature collection circuit (40), wherein,The ADC sample circuits (20) include multiple sensor interfaces for being used to connect the temperature sensor (10), the temperature Spend sensor (10) and the ADC sample circuits (20) are connected by the sensor interface；The gate control circuit (30) connects the ADC sample circuits (20), for exporting gate control signal to the ADC Sample circuit (20), to control the gating of the temperature sensor (10)；The temperature collection circuit (40) connects the ADC sample circuits (20), for gathering the temperature sensor (10) production Raw induced-current, and then calculate the temperature of the temperature sensor (10) sensing.
- 2. multichannel temperature Acquisition Circuit according to claim 1, it is characterised in that ADC sample circuits (20) bag Include：Multiway analog switch selection circuit (201) with multiple analog switches, gate control circuit (30) connection are described more The input of path analoging switch selection circuit (201), input gate control signal；Multiple temperature sensors (10) connect respectively Connect each road output end of the multiway analog switch selection circuit (201)；The multiway analog switch selection circuit (201) controlled according to the gate control signal opening of the analog switch/ Close, and then control the gating of the temperature sensor (10).
- 3. multichannel temperature Acquisition Circuit according to claim 2, it is characterised in that gate control circuit (30) bag Include：For produce enabled analog switch signal enabled circuit, for produce the first address gating signal the first gating circuit, For producing the second gating circuit of the second address gating signal；The enabled circuit, the first gating circuit, the second gating circuit connect the input of the ADC sample circuits (20) respectively End, the ADC sample circuits (20) are according to enabled analog switch signal, the first address gating signal and second address Gating signal controls the gating of the analog switch.
- 4. multichannel temperature Acquisition Circuit according to claim 3, it is characterised in that the ADC sample circuits (20) are MAX14778ETP chips.
- 5. multichannel temperature Acquisition Circuit according to claim 4, it is characterised in that described in the enabled circuit connection The pin 10 and pin 16 of MAX14778ETP chips, input the enabled analog switch signal；The first gating circuit connection The pin 11 and pin 15 of the MAX14778ETP chips, input first address gating signal；Second gating circuit The pin 12 and pin 14 of the MAX14778ETP chips are connected, inputs second address gating signal.
- 6. multichannel temperature Acquisition Circuit according to claim 4, it is characterised in that the MAX14778ETP chips I/O mouths are used to connect the temperature sensor (10).
- 7. according to the multichannel temperature Acquisition Circuit described in claim any one of 4-6, it is characterised in that the temperature acquisition electricity Road (40) includes ADS1247IPWR chips.
- 8. multichannel temperature Acquisition Circuit according to claim 7, it is characterised in that the MAX14778ETP chips Pin 5 connects the pin 9 and pin 10 of the ADS1247IPWR chips, and the pin 1 of the MAX14778ETP chips connects institute The pin 11 and pin 12 of ADS1247IPWR chips are stated, the pin 1 of the MAX14778ETP chips connects reference resistance R246 One end, the reference resistance R246 the other end ground connection；The direct current electricity output of the MAX14778ETP chips output is described with reference to electricity by gathering to the reference resistance R246 The voltage at R246 both ends is hindered, calculates the temperature of the temperature sensor (10) sensing.
- 9. multichannel temperature Acquisition Circuit according to claim 8, it is characterised in that the ADS1247IPWR chips Pin 5 connects one end of the reference resistance R246, and the pin 6 of the ADS1247IPWR chips connects the reference resistance The R246 other end.
- 10. multichannel temperature Acquisition Circuit according to claim 9, it is characterised in that the ADS1247IPWR chips Pin 5 passes through electricity by resistance R245 connections reference resistance R246 one end, the pin 6 of the ADS1247IPWR chips Hinder the R247 connections reference resistance R246 other end；The pin 5 of the MAX14778ETP chips passes through the pin 10 of the resistance R240 connections ADS1247IPWR chips, institute The pin 1 for stating MAX14778ETP chips passes through the pin 11 of the resistance R244 connections ADS1247IPWR chips.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721086380.0U CN207215304U (en) | 2017-08-28 | 2017-08-28 | A kind of multichannel temperature Acquisition Circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721086380.0U CN207215304U (en) | 2017-08-28 | 2017-08-28 | A kind of multichannel temperature Acquisition Circuit |
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| Publication Number | Publication Date |
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| CN207215304U true CN207215304U (en) | 2018-04-10 |
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|---|---|---|---|
| CN201721086380.0U Expired - Fee Related CN207215304U (en) | 2017-08-28 | 2017-08-28 | A kind of multichannel temperature Acquisition Circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374151A (en) * | 2018-12-21 | 2019-02-22 | 广州市优仪电子科技有限公司 | Temperature sensing circuit |
| CN115639496A (en) * | 2022-10-18 | 2023-01-24 | 河北宝利输变电设备制造有限公司 | Intelligent power distribution cabinet state monitoring system |
| WO2024031925A1 (en) * | 2022-08-10 | 2024-02-15 | 湖北亿纬动力有限公司 | Battery temperature acquisition system and charging and discharging device |
-
2017
- 2017-08-28 CN CN201721086380.0U patent/CN207215304U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374151A (en) * | 2018-12-21 | 2019-02-22 | 广州市优仪电子科技有限公司 | Temperature sensing circuit |
| WO2024031925A1 (en) * | 2022-08-10 | 2024-02-15 | 湖北亿纬动力有限公司 | Battery temperature acquisition system and charging and discharging device |
| CN115639496A (en) * | 2022-10-18 | 2023-01-24 | 河北宝利输变电设备制造有限公司 | Intelligent power distribution cabinet state monitoring system |
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Granted publication date: 20180410 Termination date: 20210828 |