CN204142369U

CN204142369U - The reading device of a kind of temperature sensor sequence number and temperature value

Info

Publication number: CN204142369U
Application number: CN201420630384.0U
Authority: CN
Inventors: 张鹏
Original assignee: Beijing Institute of Radio Measurement
Current assignee: Beijing Institute of Radio Measurement
Priority date: 2014-10-28
Filing date: 2014-10-28
Publication date: 2015-02-04
Anticipated expiration: 2024-10-28

Abstract

The utility model relates to the reading device of a kind of temperature sensor sequence number and temperature value, comprise for sending acquisition instructions to telecommunication circuit, also change for the sequence number of the sensor by reception and temperature value, and transformation result is sent to the data processing circuit of data display circuit, for the acquisition instructions of reception is sent to interface circuit, the telecommunication circuit of data processing circuit is also sent to for the sequence number that fed back by interface circuit and temperature value, for being connected with temperature sensor to be detected, sequence number and the temperature value of temperature sensor is obtained according to the acquisition instructions of telecommunication circuit transmission, and send the interface circuit of telecommunication circuit to, for showing the sequence number after conversion and temperature value, determine the data display circuit of the temperature sensor broken down according to sequence number and temperature value.By the sequence number of read sensor and temperature value, the utility model judges that whether this sensor is normal, effectively solve the problem of localization of fault and investigation difficulty in sensor network.

Description

The reading device of a kind of temperature sensor sequence number and temperature value

Technical field

The utility model relates to electronic technology field, particularly relates to the reading device of a kind of temperature sensor sequence number and temperature value.

Background technology

Along with the development of industrial technology, people more and more pay attention to temperature factor, and almost the industrial sector of 80% all will consider the factor of temperature.Temperature is so important for industry, advances the development of temperature sensor thus.The digital temperature sensor DS18B20 of American Dallas semiconductor company is the temperature sensor of first support in the world " one-wire bus " interface, each DS18B20 has 64 unique bit sequence number, this can make multiple DS18B20 work on a unibus, because it has the particular advantages of unibus, user can be made to have set up sensor network like a cork, and multipoint temperature measuring circuit can be made to become simply, reliable, so obtain application widely.But, because multiple DS18B20 works on a unibus, once certain sensor fault in sensor network, bring certain difficulty just to the location of fault and investigation.But be not specifically designed at present and read and the circuit of displays temperature sensor sequence number and temperature value.

Utility model content

Technical problem to be solved in the utility model is for the deficiencies in the prior art, provides the reading device of a kind of temperature sensor sequence number and temperature value.

The technical scheme that the utility model solves the problems of the technologies described above is as follows: comprise data processing circuit, telecommunication circuit, interface circuit, data display circuit and power circuit; Described data processing circuit is connected with telecommunication circuit and display circuit respectively, described telecommunication circuit domain interface circuit connects, interface circuit is in being connected with temperature sensor to be detected, and described power circuit is all connected with data processing circuit, telecommunication circuit, interface circuit, data display circuit.

On the basis of technique scheme, the utility model can also do following improvement.

Further, described data processing circuit comprises configuration circuit, clock circuit and fpga chip, described configuration circuit is all connected with fpga chip with clock circuit, and described configuration circuit is used for carrying out data configuration to fpga chip, and described clock circuit is used for providing clock signal for fpga chip.

Further, described configuration circuit comprises AS interface, EPCS16 chip and jtag interface, and described AS interface is connected with one end of EPCS16 chip, and the other end of described EPCS16 chip is connected with fpga chip, and described jtag interface is connected with fpga chip.

Further, described fpga chip model is EP2C5T14418N, inside establishes configuring chip EPCS16.

Further, described clock circuit adopts 40M crystal oscillator.

Further, described telecommunication circuit comprises driving chip HCT245 and 74LVTH162245.

Further, described interface circuit comprises J18E-9S connector and three square jack printed board connectors, for being connected with temperature sensor to be measured.

Further, described display circuit adopts photoelectric combination nixie display.

Accompanying drawing explanation

Fig. 1 is the structural representation of the reading device of a kind of temperature sensor sequence number described in the utility model and temperature value;

Fig. 2 is the particular circuit configurations of Fig. 1 described in the utility model.

In accompanying drawing, the list of parts representated by each label is as follows:

1, data processing circuit, 2, telecommunication circuit, 3, interface circuit, 4, data display circuit, 5, power circuit.

Embodiment

Be described principle of the present utility model and feature below in conjunction with accompanying drawing, example, only for explaining the utility model, is not intended to limit scope of the present utility model.

As shown in Figure 1, 2, the reading device of a kind of temperature sensor sequence number and temperature value, comprises data processing circuit 1, telecommunication circuit 2, interface circuit 3, data display circuit 4 and power circuit 5; Described data processing circuit 1, it is for sending acquisition instructions to telecommunication circuit 2, also changes for the sequence number of the sensor by reception and temperature value, and transformation result is sent to data display circuit 4; Described telecommunication circuit 2, it is for sending to interface circuit 3 by the acquisition instructions of reception, also sends data processing circuit 1 to for the sequence number that fed back by interface circuit and temperature value; Described interface circuit 3, it is for being connected with temperature sensor to be detected, obtains sequence number and the temperature value of temperature sensor, and send telecommunication circuit 2 to according to the acquisition instructions of telecommunication circuit 2 transmission; Described data display circuit 4, it, for showing the sequence number after conversion and temperature value, determines the temperature sensor broken down according to sequence number and temperature value; Described power circuit 5, for providing electric power supply for whole circuit.

Described data processing circuit 1 comprises configuration circuit, clock circuit and fpga chip, described configuration circuit is all connected with fpga chip with clock circuit, described configuration circuit is used for carrying out data configuration to fpga chip, and described clock circuit is used for providing clock signal for fpga chip.Described configuration circuit comprises AS interface, EPCS16 chip and jtag interface, and described AS interface is connected with one end of EPCS16 chip, and the other end of described EPCS16 chip is connected with fpga chip, and described jtag interface is connected with fpga chip.The fpga chip that the utility model uses is the EP2C5T144I8N of altera corp, and adopts specialized configuration chip EPCS16 to carry out data configuration to it.Described clock circuit adopts 40M crystal oscillator, for FPGA provides clock signal.Described telecommunication circuit comprises driving chip HCT245 and 74LVTH162245.

Telecommunication circuit 2 is made up of driving chip HCT245 and 74LVTH162245, and described interface circuit 3 comprises J18E-9S connector and three square jack printed board connectors, for being connected with temperature sensor to be measured.Described display circuit 4 adopts photoelectric combination nixie display, and the utility model display circuit is made up of 20 photoelectric combination nixie displaies, and wherein 16 for showing 64 hexadecimal sequence number, four displays temperature values.Each device required voltage is obtained by power circuit by outside 5V power supply.

When temperature sensor to be measured is connected on device by the connector of interface circuit 3, the FPGA run detects the connection signal of temperature sensor to be measured by the driving chip of telecommunication circuit 2, the sequence number of pickup and temperature value under strict work schedule and communication protocol, FPGA needs to complete the initialization of DS18B20,64 bit sequence number reading DS18B20, startup DS18B20 temperature transition successively, read temperature transition result, finally by 64 bit sequence number of reading and Temperature numerical, shown by photoelectric combination nixie display.

The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims

1. a reading device for temperature sensor sequence number and temperature value, is characterized in that, comprises data processing circuit, telecommunication circuit, interface circuit, data display circuit and power circuit;

Described data processing circuit is connected with telecommunication circuit and display circuit respectively, described telecommunication circuit domain interface circuit connects, interface circuit is in being connected with temperature sensor to be detected, and described power circuit is all connected with data processing circuit, telecommunication circuit, interface circuit, data display circuit.

2. the reading device of a kind of temperature sensor sequence number and temperature value according to claim 1, it is characterized in that, described data processing circuit comprises configuration circuit, clock circuit and fpga chip, described configuration circuit is all connected with fpga chip with clock circuit, described configuration circuit is used for carrying out data configuration to fpga chip, and described clock circuit is used for providing clock signal for fpga chip.

3. the reading device of a kind of temperature sensor sequence number and temperature value according to claim 2, it is characterized in that, described configuration circuit comprises AS interface, EPCS16 chip and jtag interface, described AS interface is connected with one end of EPCS16 chip, the other end of described EPCS16 chip is connected with fpga chip, and described jtag interface is connected with fpga chip.

4. the reading device of a kind of temperature sensor sequence number and temperature value according to Claims 2 or 3, it is characterized in that, described fpga chip model is EP2C5T14418N, inside establishes configuring chip EPCS16.

5. the reading device of a kind of temperature sensor sequence number and temperature value according to claim 2, is characterized in that, described clock circuit adopts 40M crystal oscillator.

6. the reading device of a kind of temperature sensor sequence number and temperature value according to claim 1, it is characterized in that, described telecommunication circuit comprises driving chip HCT245 and 74LVTH162245.

7. the reading device of a kind of temperature sensor sequence number and temperature value according to claim 1, it is characterized in that, described interface circuit comprises J18E-9S connector and three square jack printed board connectors, for being connected with temperature sensor to be measured.

8. the reading device of a kind of temperature sensor sequence number and temperature value according to claim 1, is characterized in that, described display circuit adopts photoelectric combination nixie display.