CN209513082U - A kind of digit-control resistance switching module of analog total temperature information - Google Patents
A kind of digit-control resistance switching module of analog total temperature information Download PDFInfo
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- CN209513082U CN209513082U CN201920500320.1U CN201920500320U CN209513082U CN 209513082 U CN209513082 U CN 209513082U CN 201920500320 U CN201920500320 U CN 201920500320U CN 209513082 U CN209513082 U CN 209513082U
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Abstract
The utility model discloses a kind of digit-control resistance switching modules of analog total temperature information, including decoder and the identical resistance switching circuit of 4 structures being connect with decoder, the resistance switching circuit includes relay A, relay B and resistance are respectively 1, 2, 3, the first resistor of 6 Ω, second resistance, 3rd resistor and the 4th resistance, first resistor, second resistance, 3rd resistor and the 4th resistance are sequentially connected in series, and first resistor, second resistance, the both ends of 3rd resistor and the 4th resistance are parallel with relay B, first resistor, second resistance, also one relay A of both ends parallel connection after 3rd resistor and the series connection of the 4th resistance, relay A and each relay B passes through I2C bus respectively and connect with decoder, wherein three resistance switching circuits respectively represent decimal point, it is a, ten and hundred, pass through control The switch of relay processed realizes the variation of total resistance value 0~9 of resistance switching circuit.
Description
Technical field
The utility model relates to temperature signal imitation fields in atmosphere data, and in particular to a kind of analog total temperature information
Digit-control resistance switching module.
Background technique
Total temperature signal is one of basic input signal of air data computer, is given in the form of resistance, total temperature
The output resistance and total Air Temperature of sensor correspond, and the variation range of resistance is 200 Ω to 500 Ω.The prior art is logical
Crossing will realize the variation of resistance value in a relay in parallel after several resistance are connected.The control instruction of such circuit is multiple
Miscellaneous, circuit dosage is more, and precision is low.
Summary of the invention
The utility model aim is to provide that a kind of structure is simple and the numerical control electricity of the simple analog total temperature information of control
Hinder switching module.
The purpose of this utility model is achieved through the following technical solutions:
A kind of digit-control resistance switching module of analog total temperature information, including decoder and connect with decoder 4
The identical resistance switching circuit of structure, the resistance switching circuit include relay A, relay B and resistance be respectively 1,
2, the first resistor, second resistance, 3rd resistor and the 4th resistance of 3,6 Ω, first resistor, second resistance, 3rd resistor and
Four resistance are sequentially connected in series, and first resistor, second resistance, 3rd resistor and the 4th resistance both ends be parallel with relay B,
One resistance, second resistance, 3rd resistor and the 4th resistance series connection after also both ends parallel connection one relay A, relay A and each after
Electric appliance B passes through I2C bus respectively and connect with decoder, wherein three resistance switching circuits respectively represent decimal point, it is a, ten and hundred
Position realizes the variation of total resistance value 0~9 of resistance switching circuit by the switch of control relay.
Further, the decoder uses TPIC2810 decoder.
Further, the I2C bus is connected with the OD driver for driving relay.
Further, the I2C bus is also connected with master control borad.
The utility model, which passes through the resistance of four resistance values 1,2,3 and 6 Ω and controls relay to each resistance, to be realized always
The resistance value of bulk resistor realizes three-figure variation from 0~9 variation, then by three structural resistance switching circuits, which leads to
With property is strong, control is simple.
Detailed description of the invention
Fig. 1 is the reception schematic diagram of the utility model.
Fig. 2 is the resistance switching module schematic diagram of the utility model.
Specific embodiment
As shown in Figure 1 and Figure 2, the digit-control resistance switching module of analog total temperature information provided in this embodiment includes decoding
Device, I2C bus, master control borad and the identical resistance switching circuit of 4 structures, the resistance switching circuit include relay A, relay
Device B and resistance are respectively first resistor, second resistance, 3rd resistor and the 4th resistance of 1,2,3,6 Ω, first resistor,
Second resistance, 3rd resistor and the 4th resistance are sequentially connected in series, and first resistor, second resistance, 3rd resistor and the 4th resistance
Both ends are parallel with relay B, and also both ends are one in parallel after first resistor, second resistance, 3rd resistor and the series connection of the 4th resistance
Relay A, relay A and relay B are all made of the relay G6L-1P of Omron company, relay A and each relay B points
Not Tong Guo I2C bus connect with decoder, wherein three resistance switching circuits respectively represent decimal point, it is a, ten and hundred, pass through
Control the variation of total resistance value 0~9 of the switch realization resistance switching circuit of relay.
The decoder uses TPIC2810 decoder, and every channel overcurrent 100mA can directly drive relay.
The I2C bus is connected with the OD driver for driving relay.The I2C bus is also connected with master control borad,
Master control borad receives or control issues the digital signal that need to be simulated.
Relationship between 1 relay switch of table and resistance value
As can be seen from the table, it is 3 that relay contact quantity is at most sealed in ten, a position and one decimal place circuit
It is a, most 2, relay are sealed in hundred circuits, it is 11 that whole system, which at most seals in relay contact quantity, in total may
The contact resistance of addition is 0.33 Ω, customizes or the precision controlling of buying resistance is in 0.1 Ω, system accuracy reaches synthesis precision
It is not inferior to ± 0.5 Ω.
The above is only the utility model preferred embodiment, but the protection scope of the utility model is not limited to
This, any transformation carried out based on technical solution provided by the utility model and utility model design and replacement should all be covered
In the protection scope of the utility model.
Claims (4)
1. a kind of digit-control resistance switching module of analog total temperature information, it is characterised in that: including decoder and and decoder
The identical resistance switching circuit of 4 structures of connection, the resistance switching circuit includes relay A, relay B and resistance
Respectively 1,2,3, the first resistor of 6 Ω, second resistance, 3rd resistor and the 4th resistance, first resistor, second resistance, third
Resistance and the 4th resistance are sequentially connected in series, and first resistor, second resistance, 3rd resistor and the 4th resistance both ends be parallel with after
Electric appliance B goes back both ends parallel connection one relay A, relay A after first resistor, second resistance, 3rd resistor and the series connection of the 4th resistance
Pass through I2C bus respectively with each relay B to connect with decoder, wherein three resistance switching circuits respectively represent decimal point,
It is a, ten and hundred, pass through control relay switch realize resistance switching circuit total resistance value 0~9 variation.
2. the digit-control resistance switching module of analog total temperature information according to claim 1, it is characterised in that: the decoding
Device uses TPIC2810 decoder.
3. the digit-control resistance switching module of analog total temperature information according to claim 1, it is characterised in that: the I2C
Bus is connected with the OD driver for driving relay.
4. the digit-control resistance switching module of analog total temperature information according to claim 1 or 3, it is characterised in that: described
I2C bus is also connected with master control borad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920500320.1U CN209513082U (en) | 2019-04-12 | 2019-04-12 | A kind of digit-control resistance switching module of analog total temperature information |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920500320.1U CN209513082U (en) | 2019-04-12 | 2019-04-12 | A kind of digit-control resistance switching module of analog total temperature information |
Publications (1)
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| CN209513082U true CN209513082U (en) | 2019-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920500320.1U Active CN209513082U (en) | 2019-04-12 | 2019-04-12 | A kind of digit-control resistance switching module of analog total temperature information |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113848415A (en) * | 2021-01-28 | 2021-12-28 | 江西理工大学 | IRF generator, fault resistance generation method and IRF injection method |
-
2019
- 2019-04-12 CN CN201920500320.1U patent/CN209513082U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113848415A (en) * | 2021-01-28 | 2021-12-28 | 江西理工大学 | IRF generator, fault resistance generation method and IRF injection method |
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