CN201104245Y

CN201104245Y - Humiture recording instrument

Info

Publication number: CN201104245Y
Application number: CNU2006201757471U
Authority: CN
Inventors: 魏峥
Original assignee: Air Condition Inst China Academy of Architecture
Current assignee: Air Condition Inst China Academy of Architecture
Priority date: 2006-12-27
Filing date: 2006-12-27
Publication date: 2008-08-20
Anticipated expiration: 2016-12-27

Abstract

The utility model discloses a humiture recording instrument which comprises a temperature sensor module, a humidity sensor module, a humidity exchange module, a microcontroller, a memory module, a real-time clock module and a power supply module; moreover, the utility model also comprises a universal serial bus /serial bus converting circuit and a universal serial bus socket; the end of the serial bus is connected with the port of the microcontroller to achieve the date transmission with the microcontroller. Because the utility model uses the universal serial bus/ the serial bus converting circuit to replace the serial bus interface circuit of the prior art, solves the problem that the connection of the prior art is not convenient; besides, the humiture recording instrument is based on the standard of the universal serial bus USB 1.1 or 2.0, which can greatly improve the transmission speed.

Description

The humiture registering instrument

Technical field

The utility model is the registering instrument of a kind of energy time recording test environment temperature, humidity.

Background technology

The humiture registering instrument is a kind of miniature surveying instrument, can timing automatic write down temperature, the humidity of test environment medium, and store measurement result, by being connected with computing machine, can analyze measurement data.Because this instrument need not manual intervention, can also be applied to the environment that some manually can't be monitored, as occasions such as air-conditioning system debugging, dryings.The testing result of preserving is transferred in the computing machine that links to each other accurately, is very important with the data analysis that realizes the later stage.Along with the decline of cost of memory and enriching of product category, jumbo nonvolatile memory begins to be used widely gradually.Like this, the thing followed is the increase of data transmission period, humiture registering instrument of the prior art all adopts based on the interface realization of rs-232 standard and being connected and data transmission of computing machine, the weak point of this transmission mode is, transmission speed is slower, need restart computing machine and just can connect, therefore, very inconvenient when operation.

The existing recorded instrument is owing to communication modes such as employing RS-232, and when being that computing machine carries out message exchange, most devices of registering instrument like this, have just increased the unnecessary power consumption of registering instrument battery still by the powered battery of inside; In addition, the existing recorded instrument adopts analog temperature, humidity sensor mostly, like this, need or increase analog to digital conversion circuit in circuit in the processor part, has increased system energy consumption; Below all can make shortening greatly these service time for battery in this battery responsive type of the registering instrument equipment.

The utility model content

The purpose of this utility model is to remedy weak point of the prior art, provides a kind of and computer easy to connect, high capacity, measuring accuracy height, the humiture registering instrument.

For achieving the above object, the humiture registering instrument in the utility model comprises temperature sensor module, humidity sensor module, humidity modular converter, microcontroller, memory module, real time clock module and power module; Humiture registering instrument of the present utility model also comprises a USB (universal serial bus)/universal serial bus change-over circuit and USB (universal serial bus) socket; Described USB (universal serial bus)/universal serial bus change-over circuit comprises a voltage stabilizer, a USB (universal serial bus) end and a universal serial bus end; The output terminal of described voltage stabilizer connects the power end of other each several parts, with after computing machine is connected, is the each several part power supply; Described USB (universal serial bus) end connects the USB (universal serial bus) socket, to realize and being connected and data transmission of outer computer; Described universal serial bus end connects the PORT COM of microcontroller with the data transmission of realization with microcontroller.

Described temperature sensor module is digital;

Described USB (universal serial bus)/universal serial bus change-over circuit is the change-over circuit based on general-purpose serial bus USB 1.1 or 2.0 standards.

Because the utility model uses USB (universal serial bus)/universal serial bus change-over circuit to replace serial bus interface circuit of the prior art, solved the inconvenient problem that connects of the prior art; And when transmission, each parts of registering instrument are powered, thereby be to have saved battery power once more by crossing USB interface together with host computer; In circuit, adopt the real time clock module, and adopt digital temperature sensor, removed the Time Calculation work of processor from, and analog to digital conversion work, make processor software simple, the computing frequency reduces, and has saved electric energy.In addition, as then having improved transmission speed greatly based on USB (universal serial bus) 2.0 standards.

Description of drawings

Fig. 1 is the circuit theory diagrams of humiture registering instrument described in the utility model.

Fig. 2 is the circuit connecting line figure of a kind of embodiment of humiture registering instrument described in the utility model.

Embodiment

With reference to Fig. 1, humiture registering instrument in the embodiment of the present utility model comprises microcontroller 1, nonvolatile memory 2, real time clock module 3, USB (universal serial bus) 2.0/ universal serial bus change-over circuit 4, USB (universal serial bus) 5, temperature sensor module 6, humidity sensor module 7, humidity change-over circuit 8 and Voltage stabilizing module 9;

Wherein, microcontroller 1 comprises a temperature signal input end and a moisture signal input end, is used to connect the signal output part of temperature sensor 6 and the signal output part of humidity change-over circuit 8; Storer power supply control end and storer control end and data terminal, described power supply control end by the resistor control linkage in the conducting of the field effect transistor Q2 of nonvolatile memory 2 power ends with end, to realize the intermittent power supply to nonvolatile memory 2, described control end is connected with control end with nonvolatile memory 2 corresponding data terminals with data terminal; An external interrupt end links to each other with the middle broken ends of fractured bone of real time clock module 3, receives interrupt request from real time clock; A serial clock output terminal is connected with the serial clock input end of real time clock module 3, and for real time clock provides serial clock signal, a serial data input/output terminal is connected with the serial data input/output terminal of real time clock 3, with swap data; A probe power control end, the grid that connects a field effect transistor Q3, the source electrode of field effect transistor Q3 is connected the power input of microcontroller 1 and the input end of Voltage stabilizing module 9 respectively with drain electrode, microcontroller also comprises a communication port, comprises that input port RXD is connected with communication input, the delivery outlet of USB (universal serial bus) 2.0/ universal serial bus change-over circuit 4 respectively with delivery outlet TXD; And a voltage detecting port, by the power output end of R10, R11 and diode D3 connection USB (universal serial bus) 2.0/ universal serial bus change-over circuit 4, to switch the power mode of using of microcontroller.And a USB (universal serial bus) test side, be connected by the power input of resistance R 7 with USB (universal serial bus) 2.0/ universal serial bus change-over circuit 4, whether there is USB cable to insert to detect, then change data output mode over to as inserting.

Real time clock module 3 comprises an input end of clock and crystal oscillator CRY, also comprise a power end, the source electrode that connects field effect transistor Q1, the drain electrode of field effect transistor Q1 is by the positive pole of diode D1 connection supplying cell, and grid connects the power output end of USB (universal serial bus) 2.0/ universal serial bus change-over circuit 4 by resistance R 2 and diode D2; Here, power supply is the lithium ion battery of 3.6V;

USB (universal serial bus) 2.0/ universal serial bus change-over circuit 4 comprises a mu balanced circuit that is output as 3.3V, and the output terminal of mu balanced circuit is the output terminal of USB (universal serial bus) 2.0/ universal serial bus change-over circuit 4; When the power input of USB (universal serial bus) 2.0/ universal serial bus change-over circuit by USB (universal serial bus) 5 electric after, mu balanced circuit is outwards exported 3.3V voltage, otherwise is in high impedance status.

The power input of temperature sensor module 6 links to each other with the output terminal of mu balanced circuit by a temperature sensor interface 61, obtain power supply from mu balanced circuit, its signal output part also connects the temperature sensor signal input end of microcontroller by temperature sensor interface 61; Humidity sensor 7 is connected with humidity change-over circuit 8 by humidity sensor interface 71, and humidity change-over circuit 8 comprises an analog to digital conversion circuit, and the conversion of signals that humidity sensor can be collected is digital signal and the data input pin of sending into microcontroller.

With reference to Fig. 2, principle of work of the present utility model is as follows: system is by the powered battery of 3.6V, control the conducting of field effect transistor Q1 and end the power supply control that realizes microcontroller 1 and real time clock module 3 by the power output of USB (universal serial bus) 2.0/ universal serial bus change-over circuit 4, and, the diode of the power output of USB (universal serial bus) 2.0/ universal serial bus change-over circuit 4 directly links to each other with the power input of microcontroller 1 with real time clock module 3, utilize the unilateral conduction of diode, realize that power supply switches; Voltage stabilizing module 9 provides the power supply of temperature sensor module 6, humidity sensor module 7 and humidity change-over circuit 8, the input signal of temperature sensor module 6 is directly sent into and is handled in the microcontroller 1 and be saved in the non-volatile memory module 2, the output of the signal of humidity sensor module 7 is at first sent into humidity change-over circuit 8 and is carried out sending in the microcontroller 1 after the analog to digital conversion again and handle, and is saved to the corresponding address section of nonvolatile memory 2; The power supply of nonvolatile memory 2 is controlled by field effect transistor Q2 by microcontroller 1; By the record quantity of microcontroller computing store, thereby the storage address section is set for new humiture data and time data; Real time clock module 3 provides a real time clock signal, this signal in microcontroller 1 with nonvolatile memory 2 in the time data that presets compare, judge whether the current time is positioned at the acquisition time section that presets, as the result is sure, be Voltage stabilizing module 9 power supplies then, thereby open temperature sensor module 6, humidity sensor module 7 and humidity change-over circuit 8 by microcontroller 1 control field effect transistor Q3; USB (universal serial bus) 2.0/ universal serial bus change-over circuit 4 is by USB (universal serial bus) 5 and outside device with USB interface, be connected as multi-purpose computer or other industrial computers, be embodied as the data transmission of system's power supply and microcontroller 1 and outer computer or industrial computer, whether a USB (universal serial bus) test side of microcontroller 1 is connected with the power supply input port of USB (universal serial bus) 2.0/ universal serial bus change-over circuit 4, set up with the channel that detects outside USB (universal serial bus).

In the utility model, microcontroller 1 also detects by the voltage detecting port and is battery-powered or is powered by the mu balanced circuit in the USB (universal serial bus) 2.0/ universal serial bus change-over circuit 4, so that microcontroller 1 is switched between different mode of operations, and then realize balance between performance and battery consumption.

In this example, nonvolatile memory 2 is as FLASH ROM, and EEROM or EEPROM etc. is non-volatile ROM (read-only memory), and when being implemented in system's power down, the data of storage are not lost.

With reference to figure 2, the utility model comprises that also a light emitting diode D4 is connected with microcontroller 1, light when system powers on to be implemented in, and when system mistake system state deixis such as glittering.

Being the utility model preferred embodiment only in sum, is not to be used for limiting practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all should belong to technology category of the present utility model.

Claims

1. a humiture registering instrument comprises temperature sensor module, humidity sensor module, humidity modular converter, microcontroller, memory module, real time clock module and power module; It is characterized in that: also comprise a USB (universal serial bus)/universal serial bus change-over circuit, the USB (universal serial bus) socket, described USB (universal serial bus)/universal serial bus change-over circuit comprises a voltage stabilizer, a USB (universal serial bus) end and a universal serial bus end, the output terminal of described voltage stabilizer connects the power end of other each several parts, described USB (universal serial bus) end connects the USB (universal serial bus) socket, and the PORT COM that described universal serial bus end connects microcontroller is connected.

2. according to the humiture registering instrument described in the claim 1, it is characterized in that: described temperature sensor is digital.

3. according to the humiture registering instrument described in the claim 2, it is characterized in that: described USB (universal serial bus)/universal serial bus change-over circuit is the change-over circuit based on general-purpose serial bus USB 2.0 standards.

4. according to the humiture registering instrument described in the claim 1, it is characterized in that: described memory module is a non-volatile memory module.