CN202885960U - Sensor monitoring and detection system for automatic rail weighbridge - Google Patents
Sensor monitoring and detection system for automatic rail weighbridge Download PDFInfo
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- CN202885960U CN202885960U CN 201220443102 CN201220443102U CN202885960U CN 202885960 U CN202885960 U CN 202885960U CN 201220443102 CN201220443102 CN 201220443102 CN 201220443102 U CN201220443102 U CN 201220443102U CN 202885960 U CN202885960 U CN 202885960U
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Abstract
The utility model discloses a sensor monitoring and detection system for on an automatic rail weighbridge. The sensor monitoring and detection system comprises a sensor bridge, at least one sensor and a digital signal display device, wherein the at least one sensor is connected with the sensor bridge through a respective bridge lightning-proof unit, and connected with the digital signal display device through a respective signal lightning-proof unit; and the digital signal display device is provided with a sensor signal input terminal and a corresponding sensor signal output terminal. By using the sensor monitoring and detection system for the automatic rail weighbridge, the operation in an installation and debugging or maintenance and debugging process of the sensor is relatively simple, the accuracy of the installation and debugging or the maintenance and debugging of the sensor is improved, and in addition, a lightning-proof function is provided.
Description
Technical field
The utility model relates generally to the equipment of monitoring, detecting to the duty of the sensor in the automatic scale, and specifically, the utility model relates to a kind of for the Sensor monitoring on the automatic scale, detection system.
Background technology
Automatic scale is the metering outfit that railway transport vehicle is weighed.The sensor that is used for automatic scale mainly is divided into two kinds of pressure transducer and shear force sensors.In actual applications, usually adopt the mode of hardware or software that sensor signal is carried out parallel connection or stack.Because the output of sensor only has some millivolts usually, so this signal must through processes such as amplification and analog to digital conversion, could be gathered, record, process and be shown by opertaing device.In automatic scale, to finally showing at display terminal, its process is a series process with regard to the generation of sensor signal, and therefore any one link in this process breaks down, and all will cause whole system normally to move.
The reason that fault produces in the analytic signal transmission course can be divided into: sensor fault, connection fault, signal amplify and the analog to digital conversion signal superimposed anomaly etc. that causes such as unusual.
Wherein sensor fault is by being divided into the unusual and sensor damage of installation of sensors; Comprise line short and virtual connection in the connection fault.Because sensor directly contacts with rail, so thunder and lightning or track circuit also can exert an influence even cause its damage sensor.Working sensor voltage negative pole and signal amplify, the negative pole of analog to digital conversion circuit is equipotential, and therefore when working sensor voltage was subject to external interference, signal amplification, analog to digital conversion circuit were also with operation irregularity.
As shown in Figure 1, it is the synoptic diagram that the wiring of the sensor of prior art is arranged, wherein sensor is used to sensor that the direct supply of work is provided for bridge, and this power supply is provided by data collecting instrument usually; Sensor signal 1-4 is the output signal of sensor 1-4, some millivolts d. c. voltage signal normally, and these voltage signals link to each other with data collecting instrument by transmission cable as the input signal of the data collecting instrument in the automatic scale.In actual applications, can as required its output signal be carried out parallel connection.In addition, sensor is mounted in the weighing table on the rail track or below the circuit, and data collecting instrument or data presentation device are normally in the pulpit, both are situations about often having at a distance of hundreds of rice, therefore in Installation and Debugging or maintenance and debugging process, observe working sensor epidemic situation comparison difficulty, particularly in the Installation and Debugging process, because the scene may also not have the installation data Acquisition Instrument, debugs more difficult to the duty of sensor.Utilize the millivolt detection gear of common multimeter to detect, because its measuring accuracy is limited, therefore detects and debug the working sensor state and can only lean on operating personnel's experience.
The utility model content
The purpose of this utility model provides a kind of for the Sensor monitoring on the automatic scale, detection system, it can be so that relatively simple in Installation and Debugging or the operation in the maintenance and debugging process of sensor, and so that the precision of the Installation and Debugging of sensor or maintenance and debugging improves, has in addition anti-lightning strike function.
For achieving the above object, it is a kind of for the Sensor monitoring on the automatic scale, detection system that the utility model provides, and it comprises: sensor is for bridge, at least one sensor and digital signal display device; Wherein, described at least one sensor connects for bridging by supply bridge lightning protection unit and sensor separately, and the signal lighting protection unit that described at least one sensor passes through separately is connected with the digital signal display device; Described digital signal display device has sensor signal input terminal and corresponding sensor signal lead-out terminal.
Above-mentioned Sensor monitoring, the detection system that is used on the automatic scale, described signal lighting protection unit comprises signal lighting protection circuit, this signal lighting protection circuit comprises a ceramic gas discharge tube G1, two inductance L 1 and L2 and a solid discharging tube D1; Wherein, inductance L 1 is relation in parallel with inductance L 2; The first end of ceramic gas discharge tube G1 is connected to the first end of inductance L 1, and the second end of ceramic gas discharge tube G1 is connected to the first end of inductance L 2, and ceramic gas discharge tube G1 connects lightning protection grounding PE; The first end of solid discharging tube D1 is connected to the second end of inductance L 1, and the second end of solid discharging tube D1 is connected to the second end of inductance L 2.
Above-mentioned Sensor monitoring, the detection system that is used on the automatic scale, describedly comprise for the bridge lightning protection circuit for the bridge lightning protection unit that this confession bridge lightning protection circuit includes ceramic gas discharge tube and G2, four inductance L 3 to L6, solid discharging tube D1 and D2 and two voltage dependent resistor (VDR) M1 and M2; Wherein, be relation in parallel between the connecting of the series connection of inductance L 3 and inductance L 4 and inductance L 5 and inductance L 6; The first end of ceramic gas discharge tube G2 is connected to the first end of inductance L 3, and the second end of ceramic gas discharge tube G2 is connected to the first end of inductance L 5, and ceramic gas discharge tube G2 connects lightning protection grounding PE; The first end of solid discharging tube D2 is connected to the second end of inductance L 6, and the second end of solid discharging tube D2 is connected to the second end of inductance L 4; Be series connection between voltage dependent resistor (VDR) M1 and the voltage dependent resistor (VDR) M2; the first end of voltage dependent resistor (VDR) M1 is connected between inductance L 3 and the inductance L 4; the second end of voltage dependent resistor (VDR) M1 is connected to the first end of voltage dependent resistor (VDR) M2; the second end of voltage dependent resistor (VDR) M2 is connected between inductance L 5 and the inductance L 6, and the second end of voltage dependent resistor (VDR) M1 is connected first end and is connected lightning protection grounding PE with voltage dependent resistor (VDR) M2.
Above-mentioned Sensor monitoring, the detection system that is used on the automatic scale is respectively arranged with connecting valve between the adjacent sensor signal input terminal of described digital signal display device.
Above-mentioned Sensor monitoring, the detection system that is used on the automatic scale, described digital signal display device is provided with the DC/DC power module.
Above-mentioned Sensor monitoring, the detection system that is used on the automatic scale, described digital signal display device further is provided with independent current source.
Above-mentioned Sensor monitoring, the detection system that is used on the automatic scale, described connecting valve is hand switch.
Above-mentioned Sensor monitoring, the detection system that is used on the automatic scale, described connecting valve is motor operated switch.
Owing to take above technical scheme, the utility model has the advantage of:
In the utility model system, place, the two ends of sensor is provided with respectively for bridge lightning protection unit and signal lighting protection unit, and this can effectively guarantee when other parts are struck by lightning, and avoids expensive sensor to damage; In addition, even be that sensor itself is struck by lightning in some cases, because the signal lighting protection unit exists, can prevent also in the machine room that data to sensor gather and the infringement of opertaing device that sensor is controlled, as a rule, this opertaing device is more expensive.
By using system of the present utility model, when sensor is carried out installment and debugging, can use the digital signal display device that sensor is calibrated, and not need as prior art, can only lean on operating personnel's experience.In addition, the DC/DC power module provides the working power polluted of not having of isolation for the digital signal display device, so that the digital signal display device can work in the environment that is not subjected to external interference, thereby so that the calibration of sensor is more accurate.
In the utility model system, owing to be provided with connecting valve, by the operation connecting valve signal of parallel sensor as required, this is not only so that convenient to the installment and debugging of sensor, even so that the work of sensor use also more convenient.
Description of drawings
Fig. 1 is the synoptic diagram that the wiring of the sensor of prior art is arranged.
Fig. 2 is the synoptic diagram of an embodiment for the Sensor monitoring on the automatic scale, detection system of the present utility model.
Fig. 3 is the circuit diagram of the lightning protection circuit in the utility model.
Embodiment
With reference to shown in Figure 2, it is the synoptic diagram of an embodiment for the Sensor monitoring on the automatic scale, detection system of the present utility model.
In this embodiment, the Sensor monitoring, the detection system that are used on the automatic scale mainly comprise: sensor is for bridge 50, four sensor 1-4 and digital signal display device 70.In the present embodiment, be to describe as an example of four sensors example, but it will be appreciated by persons skilled in the art that the utility model is not limited in use four sensors, use one, two even six, eight sensors all to be fine.
In the present embodiment, sensor 1-4 is connected for bridge 50 with sensor by the bridge lightning protection unit 51-54 that supplies separately, and the signal lighting protection unit 61-64 that sensor 1-4 passes through separately is connected with digital signal display device 70; Described digital signal display device 70 has sensor signal input terminal 71-74 and corresponding sensor signal lead-out terminal 75-78.Wherein, the quantity of the sensor signal input terminal of digital signal display device 70 can be corresponding with the quantity of sensor, for example, have in the present embodiment four sensor 1-4, digital signal display device 70 can have four sensor signal input terminal 71-74 so.But, in other embodiments, the quantity of the sensor signal input terminal of digital signal display device 70 can be more than the quantity of sensor, for example the quantity of the sensor signal input terminal of digital signal display device 70 is eight, and when using four sensors, only need being connected to wherein, four sensor signal input terminals get final product.In addition, the quantity of sensor signal lead-out terminal is normally corresponding with the quantity of sensor signal input terminal, and when for example the quantity of sensor signal input terminal was eight, the quantity of sensor signal lead-out terminal also was eight; But the utility model also is not limited in this, and when for example the quantity of sensor signal input terminal was eight, the quantity of sensor signal lead-out terminal also can be four.
In exemplary embodiment of the present utility model, be respectively arranged with connecting valve between the adjacent sensor signal input terminal of digital signal display device 70.Take the embodiment of four above-mentioned sensors as example, can be provided with connecting valve 12 between the adjacent sensor signal input terminal 71 and 72, can be provided with connecting valve 23 between the adjacent sensor signal input terminal 72 and 73, can be provided with connecting valve 34 between the adjacent sensor signal input terminal 73 and 74, the purpose that connecting valve is set is and can optionally be input in the digital signal display device 70 after the signal parallel connection with sensor again, and at some to the sensor use occasion, and some is to the sensor test occasion, and the signal of sensor is carried out parallel connection extremely to be needed.In addition, also be adjacent if be interpreted as sensor signal input terminal 74 and sensor signal input terminal 71, so also can be provided with the connecting valve (not shown) between them.
In addition, it will be appreciated by persons skilled in the art that above-mentioned connecting valve can be hand switch, switch motion is carried out in its manual operation by operating personnel; Perhaps, above-mentioned connecting valve also can be motor operated switch, and it carries out switch motion by the control device that those skilled in the art commonly use.
In exemplary embodiment of the present utility model, digital signal display device 70 is provided with DC/DC power module 79, this DC/DC power module 79 can be connected for bridge 50 with sensor, thereby sensor is adjusted into digital signal display device 70 needed voltages for the voltage of bridge 50.In addition, it will be appreciated by persons skilled in the art that this DC/DC power module 79 can certainly be connected with other power supply, use needed voltage thereby it is adjusted into digital signal display device 70.
Further, digital signal display device 70 can also be provided with independent current source 80.This independently power supply 80 can for example be dry cell, accumulator etc., it is mainly used in independently digital signal display apparatus 70 being powered.Like this, even there is not DC/DC power module 79, perhaps when DC/DC power module 79 can't normal power supply, digital signal display device 70 also can normally be used.
Below, cooperate with reference to shown in Figure 3, be described in detail for bridge lightning protection unit 51-54 and signal lighting protection unit 61-64 of the present utility model.
Supply bridge lightning protection unit 51-54 and the signal lighting protection unit 61-64 of utility model adopt two-stage or three grades of protection circuits; the large section of large electric current high voltage that the first order will be invaded circuit releases into ground; the rear class protection is carried out step by step clamp to the residual voltage of the first order; the lightning overvoltage that lightning protection device is exported is lower than the withstand voltage level of equipment (system), has protected microelectronic device.The earth terminal of passage Surge Protector should link with machine room or lightning protection grounding nearby (PE), for induction lightening stream provides the path of releasing, consists of simultaneously the Electric potential protection system, and lightning protection grounding must not directly link with buildings lightning rod ground wire.
In an exemplary embodiment of the present utility model, signal lighting protection unit 61-64 comprises signal lighting protection circuit, shown in the top among Fig. 3 was divided, this signal lighting protection circuit comprised a ceramic gas discharge tube G1, two inductance L 1 and L2 and a solid discharging tube D1; Wherein, inductance L 1 is relation in parallel with inductance L 2; The first end of ceramic gas discharge tube G1 is connected to the first end of inductance L 1, and the second end of ceramic gas discharge tube G1 is connected to the first end of inductance L 2, and ceramic gas discharge tube G1 connects lightning protection grounding PE; The first end of solid discharging tube D1 is connected to the second end of inductance L 1, and the second end of solid discharging tube D1 is connected to the second end of inductance L 2.
In an exemplary embodiment of the present utility model, comprise for the bridge lightning protection circuit for bridge lightning protection unit 51-54, shown in the bottom among Fig. 3 was divided, this confession bridge lightning protection circuit included ceramic gas discharge tube and G2, four inductance L 3 to L6, solid discharging tube D2 and two voltage dependent resistor (VDR) M1 and M2; Wherein, be relation in parallel between the connecting of the series connection of inductance L 3 and inductance L 4 and inductance L 5 and inductance L 6; The first end of ceramic gas discharge tube G2 is connected to the first end of inductance L 3, and the second end of ceramic gas discharge tube G2 is connected to the first end of inductance L 5, and ceramic gas discharge tube G2 connects lightning protection grounding PE; The first end of solid discharging tube D2 is connected to the second end of inductance L 6, and the second end of solid discharging tube D2 is connected to the second end of inductance L 4; Be series connection between voltage dependent resistor (VDR) M1 and the voltage dependent resistor (VDR) M2; the first end of voltage dependent resistor (VDR) M1 is connected between inductance L 3 and the inductance L 4; the second end of voltage dependent resistor (VDR) M1 is connected to the first end of voltage dependent resistor (VDR) M2; the second end of voltage dependent resistor (VDR) M2 is connected between inductance L 5 and the inductance L 6, and the second end of voltage dependent resistor (VDR) M1 is connected first end and is connected lightning protection grounding PE with voltage dependent resistor (VDR) M2.
According to lightning protection circuit shown in Figure 3, the selection of the design parameter of each element in this lightning protection circuit is that those skilled in the art according to circumstances can adjust, this is not need to pay creative work to those skilled in the art, therefore no longer too much description is carried out in the selection of design parameter at this.And according to a specific embodiment of utility model, it is specific as follows that technology of the present utility model can reach technical conditions:
Power supply
Nominal operation voltage: U
N=12V;
Impact deboost: input end is during with the simulation lightning wave impulse of 10/700 μ s, 5KV, and output terminal records deboost U
B≤ 60V;
Impact discharge capacity: the simulation lightning current wave with waveform 8/20 μ s impacts, and discharge capacity is greater than 5KA;
1. be suitable for speed: 9.6kbps;
2. insertion loss: in the maximum applicable speed less than 0.5dB;
3. response time: less than 10ns;
4. work and storage requirement: working temperature :-40 ℃～+ 70 ℃, store :-10 ℃～+ 40 ℃, relative humidity are not more than 80%;
5. shell protection grade: GB4208-1993:IP20.
Signal
1. nominal operation voltage: U
N=5V;
2. impact deboost: input end is during with the simulation lightning wave impulse of 10/700 μ s, 5KV, and output terminal records deboost U
B≤ 10V;
3. impact discharge capacity: the simulation lightning current wave with waveform 8/20 μ s impacts, and discharge capacity is greater than 1.5KA;
4. be suitable for speed: 9.6kbps;
5. insertion loss: in the maximum applicable speed less than 0.5dB;
6. response time: less than 10ns;
7. work and storage requirement: working temperature :-40 ℃～+ 70 ℃, store :-10 ℃～+ 40 ℃, relative humidity are not more than 80%;
8. shell protection grade: GB4208-1993:IP20.
Above-described embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that those of ordinary skills make the technical solution of the utility model all should fall in the definite protection domain of the utility model claims.
Claims (9)
1. Sensor monitoring, a detection system that is used on the automatic scale is characterized in that it comprises: sensor confession bridge, at least one sensor and digital signal display device;
Wherein, described at least one sensor connects for bridging by supply bridge lightning protection unit and sensor separately, and the signal lighting protection unit that described at least one sensor passes through separately is connected with the digital signal display device;
Described digital signal display device has sensor signal input terminal and corresponding sensor signal lead-out terminal.
2. according to claim 1 for the Sensor monitoring on the automatic scale, detection system, it is characterized in that, described signal lighting protection unit comprises signal lighting protection circuit, and this signal lighting protection circuit comprises a ceramic gas discharge tube G1, two inductance L 1 and L2 and a solid discharging tube D1;
Wherein, inductance L 1 is relation in parallel with inductance L 2; The first end of ceramic gas discharge tube G1 is connected to the first end of inductance L 1, and the second end of ceramic gas discharge tube G1 is connected to the first end of inductance L 2, and ceramic gas discharge tube G1 connects lightning protection grounding PE; The first end of solid discharging tube D1 is connected to the second end of inductance L 1, and the second end of solid discharging tube D1 is connected to the second end of inductance L 2.
3. according to claim 1 for the Sensor monitoring on the automatic scale, detection system, it is characterized in that, describedly comprise for the bridge lightning protection circuit for the bridge lightning protection unit that this confession bridge lightning protection circuit includes ceramic gas discharge tube and G2, four inductance L 3 to L6, solid discharging tube D2 and two voltage dependent resistor (VDR) M1 and M2;
Wherein, be relation in parallel between the connecting of the series connection of inductance L 3 and inductance L 4 and inductance L 5 and inductance L 6; The first end of ceramic gas discharge tube G2 is connected to the first end of inductance L 3, and the second end of ceramic gas discharge tube G2 is connected to the first end of inductance L 5, and ceramic gas discharge tube G2 connects lightning protection grounding PE; The first end of solid discharging tube D2 is connected to the second end of inductance L 6, and the second end of solid discharging tube D2 is connected to the second end of inductance L 4; Be series connection between voltage dependent resistor (VDR) M1 and the voltage dependent resistor (VDR) M2; the first end of voltage dependent resistor (VDR) M1 is connected between inductance L 3 and the inductance L 4; the second end of voltage dependent resistor (VDR) M1 is connected to the first end of voltage dependent resistor (VDR) M2; the second end of voltage dependent resistor (VDR) M2 is connected between inductance L 5 and the inductance L 6, and the second end of voltage dependent resistor (VDR) M1 is connected first end and is connected lightning protection grounding PE with voltage dependent resistor (VDR) M2.
4. any one is described according to claim 1-3 is characterized in that for the Sensor monitoring on the automatic scale, detection system, is respectively arranged with connecting valve between the adjacent sensor signal input terminal of described digital signal display device.
5. any one is described according to claim 1-3 is characterized in that for the Sensor monitoring on the automatic scale, detection system described digital signal display device is provided with the DC/DC power module.
6. according to claim 5ly it is characterized in that for the Sensor monitoring on the automatic scale, detection system described digital signal display device further is provided with independent current source.
7. any one is described according to claim 1-3 is characterized in that for the Sensor monitoring on the automatic scale, detection system described digital signal display device is provided with independent current source.
8. according to claim 4ly it is characterized in that for the Sensor monitoring on the automatic scale, detection system described connecting valve is hand switch.
9. according to claim 4ly it is characterized in that for the Sensor monitoring on the automatic scale, detection system described connecting valve is motor operated switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220443102 CN202885960U (en) | 2012-08-31 | 2012-08-31 | Sensor monitoring and detection system for automatic rail weighbridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220443102 CN202885960U (en) | 2012-08-31 | 2012-08-31 | Sensor monitoring and detection system for automatic rail weighbridge |
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| Publication Number | Publication Date |
|---|---|
| CN202885960U true CN202885960U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220443102 Withdrawn - After Issue CN202885960U (en) | 2012-08-31 | 2012-08-31 | Sensor monitoring and detection system for automatic rail weighbridge |
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| Country | Link |
|---|---|
| CN (1) | CN202885960U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840905A (en) * | 2012-08-31 | 2012-12-26 | 北京华横新技术开发公司 | Sensor monitoring and detection system used on automatic rail weighbridge |
-
2012
- 2012-08-31 CN CN 201220443102 patent/CN202885960U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840905A (en) * | 2012-08-31 | 2012-12-26 | 北京华横新技术开发公司 | Sensor monitoring and detection system used on automatic rail weighbridge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130417 Effective date of abandoning: 20170426 |
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| AV01 | Patent right actively abandoned |