CN201886015U - Two-wire toxic gas detector - Google Patents
Two-wire toxic gas detector Download PDFInfo
- Publication number
- CN201886015U CN201886015U CN2010206441895U CN201020644189U CN201886015U CN 201886015 U CN201886015 U CN 201886015U CN 2010206441895 U CN2010206441895 U CN 2010206441895U CN 201020644189 U CN201020644189 U CN 201020644189U CN 201886015 U CN201886015 U CN 201886015U
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- wire system
- detection device
- gas detection
- circuit
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Abstract
The utility model relates to a two-wire toxic gas detector comprising a detector main body module and a sensor module that are fixedly connected with each other, wherein the detector main body module consists of a shell and a power supply unit and a master control unit that are arranged in the shell as well as an infrared ray receiving unit connected with the master control unit, the master control unit is connected with the power supply unit and the sensor module respectively, the infrared ray receiving unit is further connected with the sensor module by the master control unit, and an infrared ray receiving window is arranged on the shell. For the two-wire toxic gas detector adopting the structure, as the infrared ray receiving unit is connected with the sensor module by the master control unit, and the infrared ray receiving window is arranged on the shell, the detector can be zeroed and calibrated by infrared remote control, so that ultra-close-distant zeroing and calibrating operation to the detector are not needed, and the two-wire toxic gas detector can be applied more conveniently.
Description
Technical field
The utility model relates to sensor field, and particularly the gas detector field specifically is meant a kind of two-wire system poisonous gas detection device.
Background technology
Existing two-wire system poisonous gas detection device (two-wire system, the DC24V power supply, 4～20mA output), because the Overall Power Consumption requirement can not be greater than 4mA (DC24V), therefore major part all adopts no display structure, realizes the zeroing and the demarcation of detector by the serial connection reometer of uncapping, debugging potentiometer.Also there is part two-wire system poisonous gas detection utensil that the LED display structure is arranged, and realizes the zeroing and the demarcation of detector by the bar magnet method.But no matter whether have display structure, existing two-wire system poisonous gas detection device all needs super close distance operation, is difficult to the occasion that the place is set near gas detector at some, the application of this type of two-wire system poisonous gas detection device very inconvenience that just seems.
The utility model content
The purpose of this utility model is to have overcome above-mentioned shortcoming of the prior art, and a kind of zeroing and demarcation that super close distance carries out detector that need not is provided, and is convenient to detector application in all case, and is simple in structure, and two-wire system poisonous gas detection device with low cost.
In order to realize above-mentioned purpose, two-wire system poisonous gas detection utensil of the present utility model has following formation:
This two-wire system poisonous gas detection device, comprise the detector body module and the sensor assembly that are mutually permanently connected, described detector body module comprises housing and is arranged at housing interior power supply unit and main control unit, described main control unit connects described power supply unit and sensor assembly respectively, its principal feature is, described two-wire system poisonous gas detection device also comprises the infrared ray receiving element, described infrared ray receiving element connects described main control unit, and connect described sensor assembly by described main control unit, offer the infrared receiving window mouth on the described housing.
In this two-wire system poisonous gas detection device, described detector body module also comprises the liquid crystal display that is arranged on the housing, and described liquid crystal display connects described main control unit.Described liquid crystal display is arranged at the position of described infrared receiving window mouth.
In this two-wire system poisonous gas detection device, described main control unit comprises microprocessor, liquid crystal display circuit and infrared communication circuit, described microprocessor connects described liquid crystal display circuit, infrared communication circuit, power supply unit and sensor assembly respectively, described liquid crystal display circuit connects described liquid crystal display, and described infrared communication circuit connects described infrared ray receiving element.
In this two-wire system poisonous gas detection device, described sensor assembly is the two-wire system chemical sensor, described two-wire system chemical sensor comprises chemical gas sensor and signal processing circuit, and described chemical gas sensor connects described main control unit by described signal processing circuit.
In this two-wire system poisonous gas detection device, described microprocessor also comprises the analog to digital conversion interface, and the signal processing circuit of described two-wire system chemical sensor is connected in described analog to digital conversion interface.
In this two-wire system poisonous gas detection device, described microprocessor also comprises the LCD backlight control interface, and described LCD backlight control interface connects described liquid crystal display.
In this two-wire system poisonous gas detection device, described detector body module also comprises the light emitting diode alarm unit that is arranged on the housing, described microprocessor also comprises light emitting diode alarm lamp control interface, and described diode alarm unit is connected in described light emitting diode alarm lamp control interface.
In this two-wire system poisonous gas detection device, described power supply unit comprises intrinsically safe circuit, voltage-current converter circuit and transforming circuit, and described intrinsically safe circuit is connected described main control unit by described voltage-current converter circuit with transforming circuit.
In this two-wire system poisonous gas detection device, described housing is an explosion-proof casing, is provided with explosion-proof sintering net in the described sensor assembly.
Adopted the two-wire system poisonous gas detection device of this utility model, because it comprises the infrared ray receiving element, described infrared ray receiving element connects described main control unit, and connect described sensor assembly by described main control unit, offer the infrared receiving window mouth on the described housing, make this two-wire system poisonous gas detection device can carry out the zeroing and the demarcation of detector by infrared remote control, carry out detector zeroing and proving operation thereby need not super close distance, make the application of this two-wire system poisonous gas detection device more convenient.Two-wire system poisonous gas detection device of the present utility model is simple in structure, with low cost, and has wide range of applications.
Description of drawings
Fig. 1 is the functional module structure synoptic diagram of two-wire system poisonous gas detection device of the present utility model.
Fig. 2 is the one-piece construction synoptic diagram of two-wire system poisonous gas detection device of the present utility model.
Fig. 3 is the partition structural representation of two-wire system poisonous gas detection device of the present utility model.
Fig. 4 is the V/I change-over circuit schematic diagram of two-wire system poisonous gas detection device of the present utility model.
Fig. 5 is the system power supply change-over circuit schematic diagram of two-wire system poisonous gas detection device of the present utility model.
Fig. 6 is the sensor signal change-over circuit schematic diagram of two-wire system poisonous gas detection device of the present utility model.
Embodiment
In order more to be expressly understood technology contents of the present utility model, describe in detail especially exemplified by following examples.
See also shown in Figure 1ly, be the functional module structure synoptic diagram of two-wire system poisonous gas detection device of the present utility model.
In a kind of embodiment of the present utility model, shown in Fig. 2 and 3, this two-wire system poisonous gas detection device comprises detector body module 1 and the sensor assembly 2 that is mutually permanently connected, described detector body module 1 comprises housing 11 and is arranged at housing interior power supply unit 12 and main control unit 13 that described main control unit 13 connects described power supply unit 12 and sensor assembly 2 respectively.This two-wire system poisonous gas detection device also comprises infrared ray receiving element 14, described infrared ray receiving element 14 connects described main control unit 13, and, offer infrared receiving window mouth 15 on the described housing 11 by the described sensor assembly 2 of described main control unit 13 connections.Described detector body module also comprises the liquid crystal display 16 that is arranged at the position of infrared receiving window mouth 15 on the housing 11, and described liquid crystal display 16 connects described main control unit 13.
In a kind of more preferably embodiment, described sensor assembly 2 is the two-wire system chemical sensor, described two-wire system chemical sensor comprises chemical gas sensor and signal processing circuit, and described chemical gas sensor connects described main control unit 13 by described signal processing circuit.Described main control unit comprises microprocessor, liquid crystal display circuit and infrared communication circuit, described microprocessor connects described liquid crystal display circuit, infrared communication circuit, power supply unit 12 and sensor assembly 2 respectively, described liquid crystal display circuit connects described liquid crystal display 16, and described infrared communication circuit connects described infrared ray receiving element 14.Described microprocessor also comprises the analog to digital conversion interface, and the signal processing circuit of described two-wire system chemical sensor is connected in described analog to digital conversion interface.
In a kind of preferred embodiment, described microprocessor also comprises the LCD backlight control interface, and described LCD backlight control interface connects described liquid crystal display 16.Described detector body module also 1 comprises the light emitting diode alarm unit that is arranged on the housing, described microprocessor also comprises light emitting diode alarm lamp control interface, and described diode alarm unit is connected in described light emitting diode alarm lamp control interface.
At another kind more preferably in the embodiment, described power supply unit 12 comprises intrinsically safe circuit, voltage-current converter circuit and transforming circuit, and described intrinsically safe circuit is connected described main control unit 13 by described voltage-current converter circuit with transforming circuit.
A kind of preferred embodiment in, described housing 11 is an explosion-proof casing, is provided with explosion-proof sintering net 21 in the described sensor assembly 2.
In actual applications, two-wire system poisonous gas detection device of the present utility model is made up of detector body and toxic gas sensor, wherein detector body mainly is made up of detector loam cake, main control unit plate, power supply circuit board, detector main casing, and toxic gas sensor mainly is made up of sensor (inside is made up of gas sensitive device and signal processing circuit), explosion-proof sintering net, cylindrical shell, fly net, guard.Whole detector adopts blast resistance construction (the explosion-proof sign: Exia II CT6) of essential safety.Different gas sensor modules is built-in with the gas sensitive device of gas with various, can detect corresponding different toxic gas.Detector power source conversion plate is made up of system power supply change-over circuit and V/I change-over circuit.
The main control unit plate of detector mainly is made up of system MCU circuit and LCD display circuit and infrared remote control receiving circuit.It mainly finishes following function: 1, gas sensor signal sampling (A/D conversion); 2, LCD liquid crystal drive and demonstration; 3, infrared remote control communication interface (can accept orders such as demarcation, zeroing and parameter are provided with); 4, warning LED lamp control; 5, backlight control interface; 6 and the interface of D/A conversion chip.
The V/I change-over circuit, as shown in Figure 4, the master control borad microprocessor is handled gas concentration signal through software filtering and intellectuality after, transform through 12 D/A again, output voltage simulating signal Vin is added to the Vin input pin that special-purpose two-wire system V/I transforms chip, again according to formula: Iout=100 (Vin/Rin), I=100Iin, system is with regard to the current signal of output and detected gas concentration proportion relation.
The system power supply change-over circuit, as shown in Figure 5, the external DC24V power supply of detector, the LDO circuit conversion of forming through 1Q2 and 1U2 is DC8.5V, is DC3.3V by IU3 (DC/DC chip) circuit conversion after pressure limiting again, for sensor circuit and master control borad power supply use.
The gas sensor module circuit, as shown in Figure 6, toxic gas three-electrode electro Chemical type gas sensor 2S1 is converted to little current signal to gas concentration signal, amplify, be converted to voltage signal through the U1C operational amplifier again, after U1D and further amplification of U1A operational amplifier and Filtering Processing, output to the A/D conversion mouth of single-chip microcomputer again, wherein the V2 voltage reference can provide some particular electrical chemical sensor required bias voltage, and the U1B operational amplifier is the balancing circuitry of sensor.
Adopted the two-wire system poisonous gas detection device of this utility model, because it comprises the infrared ray receiving element, described infrared ray receiving element connects described main control unit, and connect described sensor assembly by described main control unit, offer the infrared receiving window mouth on the described housing, make this two-wire system poisonous gas detection device can carry out the zeroing and the demarcation of detector by infrared remote control, carry out detector zeroing and proving operation thereby need not super close distance, make the application of this two-wire system poisonous gas detection device more convenient.Two-wire system poisonous gas detection device of the present utility model is simple in structure, with low cost, and has wide range of applications.
In this instructions, the utility model is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from spirit and scope of the present utility model.Therefore, instructions and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (10)
1. two-wire system poisonous gas detection device, this detector comprises detector body module and the sensor assembly that is mutually permanently connected, described detector body module comprises housing and is arranged at housing interior power supply unit and main control unit, described main control unit connects described power supply unit and sensor assembly respectively, it is characterized in that, described two-wire system poisonous gas detection device also comprises the infrared ray receiving element, described infrared ray receiving element connects described main control unit, and connect described sensor assembly by described main control unit, offer the infrared receiving window mouth on the described housing.
2. two-wire system poisonous gas detection device according to claim 1 is characterized in that described detector body module also comprises the liquid crystal display that is arranged on the housing, and described liquid crystal display connects described main control unit.
3. two-wire system poisonous gas detection device according to claim 2 is characterized in that described liquid crystal display is arranged at the position of described infrared receiving window mouth.
4. two-wire system poisonous gas detection device according to claim 2, it is characterized in that, described main control unit comprises microprocessor, liquid crystal display circuit and infrared communication circuit, described microprocessor connects described liquid crystal display circuit, infrared communication circuit, power supply unit and sensor assembly respectively, described liquid crystal display circuit connects described liquid crystal display, and described infrared communication circuit connects described infrared ray receiving element.
5. two-wire system poisonous gas detection device according to claim 4, it is characterized in that, described sensor assembly is the two-wire system chemical sensor, described two-wire system chemical sensor comprises chemical gas sensor and signal processing circuit, and described chemical gas sensor connects described main control unit by described signal processing circuit.
6. two-wire system poisonous gas detection device according to claim 5 is characterized in that described microprocessor also comprises the analog to digital conversion interface, and the signal processing circuit of described two-wire system chemical sensor is connected in described analog to digital conversion interface.
7. two-wire system poisonous gas detection device according to claim 4 is characterized in that described microprocessor also comprises the LCD backlight control interface, and described LCD backlight control interface connects described liquid crystal display.
8. two-wire system poisonous gas detection device according to claim 4, it is characterized in that, described detector body module also comprises the light emitting diode alarm unit that is arranged on the housing, described microprocessor also comprises light emitting diode alarm lamp control interface, and described diode alarm unit is connected in described light emitting diode alarm lamp control interface.
9. two-wire system poisonous gas detection device according to claim 1, it is characterized in that, described power supply unit comprises intrinsically safe circuit, voltage-current converter circuit and transforming circuit, and described intrinsically safe circuit is connected described main control unit by described voltage-current converter circuit with transforming circuit.
10. according to each described two-wire system poisonous gas detection device in the claim 1 to 9, it is characterized in that described housing is an explosion-proof casing, be provided with explosion-proof sintering net in the described sensor assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206441895U CN201886015U (en) | 2010-12-06 | 2010-12-06 | Two-wire toxic gas detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206441895U CN201886015U (en) | 2010-12-06 | 2010-12-06 | Two-wire toxic gas detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201886015U true CN201886015U (en) | 2011-06-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206441895U Expired - Lifetime CN201886015U (en) | 2010-12-06 | 2010-12-06 | Two-wire toxic gas detector |
Country Status (1)
| Country | Link |
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| CN (1) | CN201886015U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841181A (en) * | 2012-08-31 | 2012-12-26 | 哈尔滨东方报警设备开发有限公司 | Gas detector for two-wire system displaying through digital tube |
-
2010
- 2010-12-06 CN CN2010206441895U patent/CN201886015U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841181A (en) * | 2012-08-31 | 2012-12-26 | 哈尔滨东方报警设备开发有限公司 | Gas detector for two-wire system displaying through digital tube |
| CN102841181B (en) * | 2012-08-31 | 2015-07-15 | 哈尔滨东方报警设备开发有限公司 | Gas detector for two-wire system displaying through digital tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: AEGIS INDUSTRIAL SAFETY EQUIPMENT CO., LTD. Free format text: FORMER NAME: AEGIS INDUSTRIAL SAFETY CORPORATION |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 201204 Shanghai city Pudong New Area Lianxi road 1210 Building No. 3 Patentee after: SHANGHAI AEGIS INDUSTRIAL SAFETY CORPORATION Address before: 201204 Shanghai city Pudong New Area Lianxi road 1210 Building No. 3 Patentee before: Shanghai Yijie Industrial Security Technology Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110629 |