CN202853916U - Temperature sensor simulation apparatus - Google Patents

Abstract

Provided by the utility model is a temperature sensor simulation apparatus that comprises a key input detection module, an MCU processing module, an LED display module, and a level conversion output module. The key input detection module, the LED display module, and the level conversion output module are respectively connected with the MCU processing module. According to the type of a sensor selected by an operator and a set temperature value, a level signal of the sensor of the type can be simulated accurately; the level signal is stable without hopping; the response can be carried out timely and the display is realized visually; the test efficiency is improved; and the test period is shortened.

Description

A kind of temperature sensor analogue means

Technical field

The utility model relates to the Sensor Analog Relay System device that uses in a kind of air conditioner R﹠D process, specifically refers to a kind of Sensor Analog Relay System device for the test environment temperature.

Background technology

In air conditioner etc. need to carry out system that scene temperature detects, more uses temperature sensor as the means of temperature sampling, temperature sensor commonly used generally is temperature coefficient thermistor, this type of thermistor is along with variation self resistance of temperature also changes, and temperature and resistance have one to one relation.Utilize this characteristic, its resistance with a fixed resistance value can be connected, calculate current resistance of sensor by detecting this sensor side change in voltage, just can obtain again the temperature of current sampling point by the corresponding curve of inquiring about this sensor temperature and resistance.In the air conditioner performance history, the designer need to carry out function and performance test at test platform for whether the software and hardware of verifying air-conditioning products conforms with designing requirement.Particularly when verifying software control algolithm correctness, need to simulate various operating ambient temperatures, temperature sensor with reality comes connected system, and test by changing environment temperature, need to add outside plant and change environment temperature and realize test input, complicated operation, can not accurately control, intuitive is poor and the progress of low-response, shortcoming all seriously the hinders software development test such as test period is long, testing cost is high.

The utility model content

Have problems for prior art, technical problem to be solved in the utility model is, a kind of temperature sensor analogue means is provided, the sensor type of can be accurately selecting according to operating personnel and the temperature value of setting are simulated the level signal of the sensor of the type, level signal is stable without saltus step, timely and the intuitive display of response improves testing efficiency, shortens test period.

For solving the problems of the technologies described above, technical solution adopted in the utility model is, a kind of temperature sensor analogue means is provided, and it comprises key-press input detection module, MCU processing module, LED display module, level conversion output module; Key-press input detection module, LED display module are connected the MCU processing module respectively with the level conversion output module.

Above-mentioned temperature sensor analogue means, its key-press input detection module connect MCU processing module input end.

Above-mentioned temperature sensor analogue means, its LED display module is connected respectively MCU processing module output terminal with the level conversion output module.

Above-mentioned temperature sensor analogue means, its LED display module is comprised of four seven sections LED charactrons.

The utlity model has following advantage and useful technique effect:

1, temperature sensor analogue means of the present utility model can direct modeling goes out the sensor level signal and offers system's control mainboard and carry out the temperature data sampling;

2, temperature sensor analogue means of the present utility model has LED demonstration and key-press input, the sensor type of can be accurately selecting according to operating personnel and the temperature value of setting are simulated the level signal of the sensor of the type, level signal is stable without saltus step, the timely and intuitive display of response;

3, temperature sensor analogue means of the present utility model can be easily according to the temperature of tester's setting, the temperature resistance curve of choosing, automatically calculate actual sensor level signal level, and output to control mainboard the temperature sampling port, the function of analog temperature sensor.

Description of drawings

Fig. 1 is hardware elementary diagram of the present utility model;

Fig. 2 is system chart of the present utility model;

Fig. 3 is the utility model workflow.

Embodiment

As shown in Figure 2, the temperature sensor analogue means of present embodiment, it comprises key-press input detection module, MCU processing module, LED display module, level conversion output module; Key-press input detection module, LED display module are connected the MCU processing module respectively with the level conversion output module; The key-press input detection module connects MCU processing module input end; The LED display module is connected respectively MCU processing module output terminal with the level conversion output module; The LED display module is comprised of four seven sections LED charactrons.

The temperature sensor analogue means of present embodiment provides four buttons for user's operation, finishes sensor type selection, design temperature setting operation:

1, [function key]: first LED7 segment numeral pipe can show " S " after pressing [function key], and expression this moment enters sensor type state is set;

2, [increase key] and [minimizing key]: whenever press next time [increase key] or [minimizing key] once, corresponding numeral just increases or reduces 1, and always according to [increase key] or [minimizing key], corresponding numeral can increase or reduce fast;

3, [acknowledgement key]: press [acknowledgement key] then Set For Current have an effect.

The LED display module of present embodiment is to be made of four seven sections LED charactrons, sensor type, the target temperature of setting, the current temperature value can the display operation personnel chosen.When entering sensor type state be set, first seven sections LED charactrons show that " S " represents current is to select sensor type, and the numeral of second, the 3rd, the 4th charactron combination then represents the numbering (scope that arranges in this device is 1 to 999) of current sensor type.When entering the temperature setting configuration state, first seven sections LED charactrons are not shown as and extinguish state, represent that current is to arrange to want the output temperature state this moment, the numeral of second, the 3rd, the 4th charactron combination represents that then (scope of setting is subzero 99 to 999 degrees centigrade above freezing for the temperature of Set For Current, wherein when temperature when being subzero, second charactron shows that "-" representation temperature is subzero, the absolute value of the digitized representation temperature of the 3rd, the 4th charactron combination; When temperature when being above freezing, the numeral of second, the 3rd, the 4th charactron combination then represents the temperature of Set For Current).

The level conversion output module of present embodiment is that theoretical level value is outputed to the control mainboard to carry out sample detecting by the DA conversion, and this module directly is connected with the sensor sample port of control mainboard.

The temperature sensor analogue means operating procedure of present embodiment is as follows:

The first step: this device output port is connected with control mainboard sensor detection port, connects rear device and automatically reset and bring into operation;

Second step: press [function key], this device enters under the sensor type selection function, first LED shows that letter " S " represents that current is to carry out the sensor type setting, second, the 3rd, the 4th LED combined digital represent current selected sensor type numbering (acquiescence be 1, this device can be stored altogether 10 kinds of sensor types of numbering 1-10), whenever press once [increase key] sensor type numbering and increase by 1, whenever press once [minimizing key] sensor type numbering and reduce 1, numbering circulates between 1-10; Choose behind the sensor type under current numbering by [acknowledgement key] then this device will select sensor type corresponding to current numbering as the sensor type of simulation, and automatically enter into temperature function be set;

The 3rd step: after entering into temperature function being set, second, the 3rd, the 4th LED combined digital shows the current temperature value that will set, whenever press once [increase key] set temperature value and just increase by 1 degree, whenever press once [minimizing key] set temperature value and just reduce by 1 degree, repeatedly pressing [increase key] or [minimizing key] just can adjust on the temperature value that needs to arrange, by [acknowledgement key], the temperature sensor analogue means of present embodiment outputs to control mainboard sample port with the corresponding analog level of the temperature value that sets and finishes sensor electrical flat-die plan after setting the temperature value that needs to set.

If in the 3rd step operation, long-time operation push-button (above 15 seconds) not, this device will show the last effectively temperature value of setting automatically; Power supply is provided by the control mainboard, set design temperature after, will keep always theoretical level value corresponding to output design temperature.

The above, only be to preferred embodiment of the present utility model, be not to be that the utility model is done other forms of restriction, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every the utility model scheme content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment does, still belongs to protection domain of the present utility model according to technical spirit of the present utility model.

Claims (4)

1. temperature sensor analogue means, it is characterized in that: it comprises key-press input detection module, MCU processing module, LED display module, level conversion output module; Key-press input detection module, LED display module are connected the MCU processing module respectively with the level conversion output module.

2. temperature sensor analogue means according to claim 1 is characterized in that: described key-press input detection module connection MCU processing module input end.

3. temperature sensor analogue means according to claim 1, it is characterized in that: described LED display module is connected respectively MCU processing module output terminal with the level conversion output module.

4. according to claim 1 or 3 described temperature sensor analogue means, it is characterized in that: described LED display module is comprised of four seven sections LED charactrons.

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