CN204575213U - A kind of portable inspectiont data transmission device - Google Patents
A kind of portable inspectiont data transmission device Download PDFInfo
- Publication number
- CN204575213U CN204575213U CN201520241328.2U CN201520241328U CN204575213U CN 204575213 U CN204575213 U CN 204575213U CN 201520241328 U CN201520241328 U CN 201520241328U CN 204575213 U CN204575213 U CN 204575213U
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- China
- Prior art keywords
- resistance
- shell body
- operational amplifier
- usb interface
- temperature
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Abstract
The utility model provides a kind of portable inspectiont data transmission device, mainly comprise shell body, shell body front end face is provided with LCD display, control knob is provided with below display screen, shell side is provided with USB interface, RJ45 interface and joint, shell body inside is provided with storer, USB interface chip, Ethernet chip, microprocessor and temperature collect module, temperature collect module comprises temperature conversion circuit and differential amplifier circuit, shell body upper surface is also provided with wireless modem, the utility model structure is simple, volume is little, the temperature collect module adopted can realize industrial field device temperature and accurately measure, and can realize wired, wireless two kinds of modes carry out Signal transmissions, practical.
Description
Technical field:
The utility model relates to a kind of pick-up unit, particularly relates to a kind of portable inspectiont data transmission device.
Background technology:
Temperature is that current industry spot needs one of important physical quantity measured, the change of industrial field device temperature directly can affect on-the-spot safety, existing industrial field device temperature measuring equipment is measured not accurate, when temperature data transmits, can only be connected with host computer by single interface, not provide the interface of polytype plug and play, if not when industry spot, then cannot obtain real-time device temperature situation, inconvenient with upper machine communication.
Utility model content:
In order to solve the problem, the utility model provides that a kind of structure is simple, volume is little, can realize industrial field device temperature and accurately measure, and can realize wired, wireless two kinds of modes and carry out Signal transmissions, practical technical scheme:
A kind of portable inspectiont data transmission device, mainly comprise shell body, shell body front end face is provided with LCD display, control knob is provided with below LCD display, shell body side is provided with USB interface, RJ45 interface and joint, shell body inside is provided with storer, USB interface chip, Ethernet chip, microprocessor and temperature collect module, and temperature collect module comprises temperature conversion circuit and differential amplifier circuit, and shell body upper surface is also provided with wireless modem.
As preferably, USB interface connects microprocessor by USB interface chip, RJ45 interface connects microprocessor by Ethernet chip, joint connects microprocessor by temperature collect module, microprocessor also connects LCD display, control knob and wireless modem, USB interface also connection signal converting unit, signal processing unit successively, joint also connects commercial unit temperature sensor.
As preferably, temperature conversion circuit comprises resistance A, resistance B, resistance C, platinum resistance D, and resistance A and platinum resistance D is connected in series voltage input end, and resistance B and resistance C is connected in series voltage output end, resistance C and platinum resistance D common end grounding, resistance A is connected voltage-reference with resistance B common port.
As preferably, differential amplifier circuit comprises resistance E, resistance F, resistance G, resistance H and operational amplifier, resistance E accesses operational amplifier negative input, resistance F accesses operational amplifier electrode input end, resistance H accesses operational amplifier electrode input end and ground connection, operational amplifier output terminal contact resistance I, resistance G is connected between operational amplifier negative input and output terminal.
The beneficial effects of the utility model are:
(1) the utility model is at temperature collect module set temperature change-over circuit and differential amplifier circuit, strong anti-interference performance, can realize industrial field device temperature and accurately measure.
(2) the utility model arranges wireless modem and signaling interface line on shell body, can realize wired, wireless two kinds of modes and carry out Signal transmissions, conveniently uses in industry spot.
Accompanying drawing illustrates:
Fig. 1 is shape assumption diagram of the present utility model;
Fig. 2 is shell body internal module connection layout of the present utility model;
Fig. 3 is temperature conversion circuit figure of the present utility model;
Fig. 4 is differential amplifier circuit figure of the present utility model.
Embodiment:
For making goal of the invention of the present utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
As shown in Figure 1-2, a kind of portable inspectiont data transmission device, mainly comprise shell body 1, shell body 1 front end face is provided with LCD display 2, control knob 3 is provided with below LCD display 2, shell body 1 side is provided with USB interface 4, RJ45 interface 5 and joint 6, shell body 1 inside is provided with storer 7, USB interface chip 8, Ethernet chip 9, microprocessor 10 and temperature collect module 11, temperature collect module 11 comprises temperature conversion circuit 12 and differential amplifier circuit 13, shell body 1 upper surface is also provided with wireless modem 14, USB interface 4 connects microprocessor 10 by USB interface chip 8, RJ45 interface 5 connects microprocessor 10 by Ethernet chip 9, joint 6 connects microprocessor 10 by temperature collect module 11, microprocessor 10 also connects LCD display 2, control knob 3 and wireless modem 14, USB interface 4 also connection signal converting unit 15 successively, signal processing unit 16, joint 4 also connects commercial unit temperature sensor.The utility model arranges wireless modem and signaling interface line on shell body, can realize wired, wireless two kinds of modes and carry out Signal transmissions, conveniently uses in industry spot.
As shown in Figure 3, temperature conversion circuit 12 comprises resistance A 1a, resistance B 2a, resistance C 3a, platinum resistance D 4a, resistance A 1a and platinum resistance D 4a is connected in series voltage input end, resistance B 2a and resistance C 3a is connected in series voltage output end, resistance C 3a and platinum resistance D 4a common end grounding, resistance A 1a is connected voltage-reference with resistance B 2a common port, the voltage of the constant 3.3V that voltage-reference exports, when the resistance of joint 4 jointing temp sensors changes time, voltage input end changes, and voltage output end is invariable, the difference of the two is sent into the anti-phase and in-phase input end of differential amplifier circuit 16, magnitude of voltage is at that time gathered after amplifying, be converted into temperature value at that time.
As shown in Figure 4, differential amplifier circuit 13 comprises resistance E 5a, resistance F 6a, resistance G 7a, resistance H 8a and operational amplifier U, resistance E 5a accesses operational amplifier U negative input, resistance F 6a accesses operational amplifier U electrode input end, resistance H 8a accesses operational amplifier U electrode input end and ground connection, operational amplifier U output terminal contact resistance I 9a, resistance G 7a is connected between operational amplifier U negative input and output terminal.Resistance G 7a resistance size equals resistance H 8a resistance size, resistance E 5a resistance size equals resistance F 6a resistance size, make operational amplifier U two input ends resistance balance over the ground, avoid reducing common-mode rejection ratio, the utility model is set temperature change-over circuit and differential amplifier circuit in temperature collect module, strong anti-interference performance, can realize industrial field device temperature and accurately measure.
Above-described embodiment is preferred embodiment of the present utility model; it is not the restriction to technical solutions of the utility model; as long as without the technical scheme that creative work can realize on the basis of above-described embodiment, all should be considered as falling within the scope of the rights protection of the utility model patent.
Claims (4)
1. a portable inspectiont data transmission device, mainly comprise shell body (1), it is characterized in that: described shell body (1) front end face is provided with LCD display (2), described LCD display (2) below is provided with control knob (3), described shell body (1) side is provided with USB interface (4), RJ45 interface (5) and joint (6), described shell body (1) inside is provided with storer (7), USB interface chip (8), Ethernet chip (9), microprocessor (10) and temperature collect module (11), described temperature collect module (11) comprises temperature conversion circuit (12) and differential amplifier circuit (13), described shell body (1) upper surface is also provided with wireless modem (14).
2. a kind of portable inspectiont data transmission device according to claim 1, it is characterized in that: described USB interface (4) connects described microprocessor (10) by described USB interface chip (8), described RJ45 interface (5) connects described microprocessor (10) by described Ethernet chip (9), described joint (6) connects described microprocessor (10) by described temperature collect module (11), described microprocessor (10) also connects described LCD display (2), described control knob (3) and described wireless modem (14), described USB interface (4) also connection signal converting unit (15) successively, signal processing unit (16), described joint (4) also connects commercial unit temperature sensor.
3. a kind of portable inspectiont data transmission device according to claim 1, it is characterized in that: described temperature conversion circuit (12) comprises resistance A (1a), resistance B (2a), resistance C (3a), platinum resistance D (4a), resistance A (1a) and platinum resistance D (4a) are connected in series voltage input end, resistance B (2a) and resistance C (3a) are connected in series voltage output end, resistance C (3a) and platinum resistance D (4a) common end grounding, resistance A (1a) is connected voltage-reference with resistance B (2a) common port.
4. a kind of portable inspectiont data transmission device according to claim 1, it is characterized in that: described differential amplifier circuit (13) comprises resistance E (5a), resistance F (6a), resistance G (7a), resistance H (8a) and operational amplifier (U), resistance E (5a) accesses operational amplifier (U) negative input, resistance F (6a) accesses operational amplifier (U) electrode input end, resistance H (8a) accesses operational amplifier (U) electrode input end and ground connection, operational amplifier (U) output terminal contact resistance I (9a), resistance G (7a) is connected on operational amplifier (U) between negative input and output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520241328.2U CN204575213U (en) | 2015-04-18 | 2015-04-18 | A kind of portable inspectiont data transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520241328.2U CN204575213U (en) | 2015-04-18 | 2015-04-18 | A kind of portable inspectiont data transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204575213U true CN204575213U (en) | 2015-08-19 |
Family
ID=53867832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520241328.2U Expired - Fee Related CN204575213U (en) | 2015-04-18 | 2015-04-18 | A kind of portable inspectiont data transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204575213U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404221A (en) * | 2016-11-15 | 2017-02-15 | 洛阳市大米电子科技有限公司 | Portable temperature detection instrument |
-
2015
- 2015-04-18 CN CN201520241328.2U patent/CN204575213U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404221A (en) * | 2016-11-15 | 2017-02-15 | 洛阳市大米电子科技有限公司 | Portable temperature detection instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20160418 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |