CN101504793B - Protection method for remote meter reading system and electronic protection device - Google Patents
Protection method for remote meter reading system and electronic protection device Download PDFInfo
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- CN101504793B CN101504793B CN 200910058626 CN200910058626A CN101504793B CN 101504793 B CN101504793 B CN 101504793B CN 200910058626 CN200910058626 CN 200910058626 CN 200910058626 A CN200910058626 A CN 200910058626A CN 101504793 B CN101504793 B CN 101504793B
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Abstract
The invention relates to a method for protecting a remote meter reading system, wherein an electronic protector is arranged on a bus circuit which connects a data acquisition unit and user meters and devices and controlled by electric signals; a bus is subjected to short circuit when the system is in the idle state, and the operating mode of the bus is restored when the system is in the metering state; and the data acquisition unit and the user meters and devices form an information transmission path through the bus. The electronic protector comprises a relay and an electric control unit, wherein the relay is arranged on the bus circuit which connects the data acquisition unit and the user meters and devices; and the electric control unit is connected with a coil of the relay. The method and the electronic protector can prevent the user meters and devices from being damaged due to various interference factors, impact factors and human factors when the remote meter reading system is in the idle state.
Description
Technical field
The invention belongs to the long-distance meter-reading system field, particularly a kind of guard method of long-distance meter-reading system and protective device.
Background technology
In water, electricity and gas three table long-distance meter-reading systems, bus is connected with data collector with the subscriber's meter tool respectively, the data of subscriber's meter tool record is reached the data collector of data acquisition center by bus.Owing to normally monthly charge, data acquisition center gather subscriber's meter tool record data general one month of operation once, each working time finished within several seconds to a few minutes, and therefore, the electric part on most Time BUS and the table tool is in idle state.Present most subscriber's meter tool and equipment are indoor, bus and data collection point are outdoor, because long-distance meter-reading system no matter be in the state of checking meter still be idle state all are conductings, usually by the bus system of sealing in system is broken down, cause subscriber's meter tool and device damage because of artificial origin or forceful electric power magnetic signal.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art; provide a kind of long-distance meter-reading system guard method and with the supporting electronic type protective device of this method, the subscriber's meter tool that causes because of various interference, impact and human factor when preventing that long-distance meter-reading system is in idle state and the damage of equipment.
The guard method of long-distance meter-reading system of the present invention; be on the bus loop that connects data collector and subscriber's meter tool and equipment, the electronic type protective device to be set; control the electronic type protective device by the electric signal that long-distance meter-reading system sends; when being in idle state, system makes bus short circuit; be in system and recover the bus working method when checking meter state, make data collector, subscriber's meter tool and equipment form the information transmission path by bus.When bus short circuit, total system bus and all be in the single line closed condition with PORT COM that the subscriber's meter tool is connected with equipment, the extraneous impact of introducing by bus can not form electric loop, thereby subscriber's meter tool and equipment are protected.When bus made data collector, subscriber's meter tool and equipment form path, the data of table tool record can reach data collector, realize checking meter.
The electronic type protective device of long-distance meter-reading system of the present invention comprises relay and ECU (Electrical Control Unit); Relay is installed on the bus loop that connects data collector and subscriber's meter tool and equipment, and ECU (Electrical Control Unit) is connected with the coil of relay.
The type of relay has multiple, because long-distance meter-reading system adopts the two-wire system bus usually, therefore.Preferred dpdt relay of relay and single-pole single-throw (SPST) relay.If select dpdt relay for use, only need a relay, and dispose one group of ECU (Electrical Control Unit).If select the single-pole single-throw (SPST) relay for use, need two relays, and dispose two groups of ECU (Electrical Control Unit), two groups of ECU (Electrical Control Unit) are connected with the relay coil of control separately respectively, and the signal input end parallel connection of two groups of ECU (Electrical Control Unit).
ECU (Electrical Control Unit) can have multiple structure, and the on-off circuit that the present invention preferably is made up of triode, diode and stake resistance is as ECU (Electrical Control Unit).
The present invention has following beneficial effect:
1, adopts the method for the invention, can prevent the subscriber's meter tool that causes because of various interference, impact and human factor when long-distance meter-reading system is in idle state and the damage of equipment, have remarkable economic efficiency and social benefit.
2, electronic type protective device of the present invention can not only be realized the method for the invention, and simple in structure, is convenient to install, and cost is low, and is easy to use.
Description of drawings
Fig. 1 is the structured flowchart of the electronic type protective device of long-distance meter-reading system of the present invention;
Fig. 2 is first kind of electrical schematic diagram of the electronic type protective device of long-distance meter-reading system of the present invention, and long-distance meter-reading system is in idle state, bus short circuit;
Fig. 3 is the electronic type protective device among Fig. 2 is in the state of checking meter at long-distance meter-reading system a electrical schematic diagram;
Fig. 4 is second kind of electrical schematic diagram of the electronic type protective device of long-distance meter-reading system of the present invention, and long-distance meter-reading system is in idle state, bus short circuit;
Fig. 5 is the electronic type protective device among Fig. 4 is in the state of checking meter at long-distance meter-reading system a electrical schematic diagram;
Fig. 6 is the third electrical schematic diagram of the electronic type protective device of long-distance meter-reading system of the present invention, and long-distance meter-reading system is in idle state, bus short circuit;
Fig. 7 is the electronic type protective device among Fig. 6 is in the state of checking meter at long-distance meter-reading system a electrical schematic diagram;
Fig. 8 is the 4th a kind of electrical schematic diagram of the electronic type protective device of long-distance meter-reading system of the present invention, and long-distance meter-reading system is in idle state, bus short circuit;
Fig. 9 is the electronic type protective device among Fig. 8 is in the state of checking meter at long-distance meter-reading system a electrical schematic diagram.
Among the figure, 1-electronic type protective device, 2-relay, 3-ECU (Electrical Control Unit).
Embodiment
Below in conjunction with accompanying drawing, the guard method of long-distance meter-reading system of the present invention and the structure of electronic type protective device are described further.
The described electronic type protective device of present embodiment mainly is made up of relay 2 and ECU (Electrical Control Unit) 3.Relay 2 is selected a dpdt relay (model HRS2H-S-DC5V) for use, is installed on the two-wire system bus loop that connects data collector and subscriber's meter tool and equipment, as Fig. 2, shown in Figure 3.ECU (Electrical Control Unit) 3 is the on-off circuit that triode, diode and stake resistance are formed, and in the ECU (Electrical Control Unit), the collector of its triode is connected with the coil of relay, and emitter links to each other with stake resistance, its diode and coils from parallel connection of coils.
In the present embodiment; the use-pattern of electronic type protective device: when long-distance meter-reading system need be checked meter; the base stage of this system triode in ECU (Electrical Control Unit) 3 sends a high-level control signal; recover the bus working method after two groups of normally opened contact closures of triode turn-on relay; make data collector, subscriber's meter tool and equipment form the information transmission path, as shown in Figure 3 by bus.Check meter finish after, system's dead electricity, two groups of normally closed contact closures of relay make bus short circuit, long-distance meter-reading system promptly is in idle state, as shown in Figure 2.
The described electronic type protective device of present embodiment mainly is made up of relay 2 and ECU (Electrical Control Unit) 3.Relay 2 is selected a dpdt relay (model M1-SH-212L) for use, is installed on the two-wire system bus loop that connects data collector and subscriber's meter tool and equipment, as Fig. 4, shown in Figure 5.ECU (Electrical Control Unit) 3 is the on-off circuit that triode, diode and stake resistance are formed, and in the ECU (Electrical Control Unit), the collector of its triode is connected with the coil of relay, and emitter links to each other with stake resistance, its diode and coils from parallel connection of coils.
In the present embodiment; the use-pattern of electronic type protective device: when long-distance meter-reading system need be checked meter; the base stage of this system triode in ECU (Electrical Control Unit) 3 sends a low level control signal; recover the bus working method after two groups of normally closed contact closures of triode turn-on relay; make data collector, subscriber's meter tool and equipment form the information transmission path, as shown in Figure 5 by bus.Check meter after the end, the base stage of triode is sent into a high-level control signal in ECU (Electrical Control Unit) 3, and two groups of normally opened contact closures of triode turn-on relay make bus short circuit, and long-distance meter-reading system promptly is in idle state, as shown in Figure 4.
The described electronic type protective device of present embodiment mainly is made up of relay 2 and ECU (Electrical Control Unit) 3.Relay 2 is selected two single-pole single-throw (SPST) relays (model SM1-S-212L) for use, is installed on the two-wire system bus loop that connects data collector and subscriber's meter tool and equipment, as Fig. 6, shown in Figure 7.ECU (Electrical Control Unit) 3 is two groups, two groups of ECU (Electrical Control Unit) are the on-off circuit that triode, diode and stake resistance are formed, transistor collector in two groups of ECU (Electrical Control Unit) is connected with the relay coil of control separately respectively, transistor emitter in two groups of ECU (Electrical Control Unit) is connected with stake resistance in the unit separately respectively, diode in two groups of ECU (Electrical Control Unit) is in parallel with the relay coil of control separately respectively, the transistor base parallel connection in two groups of ECU (Electrical Control Unit).
In the present embodiment; the use-pattern of electronic type protective device: when long-distance meter-reading system need be checked meter; the base stage input high level control signal of this system triode in two groups of ECU (Electrical Control Unit) 3; triode in two groups of ECU (Electrical Control Unit) 3 recovers the bus working method after the normally opened contact closure of two relays of conducting respectively; make data collector, subscriber's meter tool and equipment form the information transmission path, as shown in Figure 7 by bus.Check meter finish after, system's dead electricity, the normally closed contact closure of two relays makes bus short circuit, long-distance meter-reading system promptly is in idle state, as shown in Figure 6.
Embodiment 4
The described electronic type protective device of present embodiment mainly is made up of relay 2 and ECU (Electrical Control Unit) 3.Relay 2 is selected two single-pole single-throw (SPST) relays (model SM1-S-212L) for use, is installed on the two-wire system bus loop that connects data collector and subscriber's meter tool and equipment, as Fig. 8, shown in Figure 9.ECU (Electrical Control Unit) 3 is two groups, two groups of ECU (Electrical Control Unit) are the on-off circuit that triode, diode and stake resistance are formed, transistor collector in two groups of ECU (Electrical Control Unit) is connected with the relay coil of control separately respectively, transistor emitter in two groups of ECU (Electrical Control Unit) is connected with stake resistance in the unit separately respectively, diode in two groups of ECU (Electrical Control Unit) is in parallel with the relay coil of control separately respectively, the transistor base parallel connection in two groups of ECU (Electrical Control Unit).
In the present embodiment; the use-pattern of electronic type protective device: when long-distance meter-reading system need be checked meter; the base stage of this system triode in two groups of ECU (Electrical Control Unit) 3 sends a low level control signal; triode in two groups of ECU (Electrical Control Unit) recovers the bus working method after the normally closed contact closure of two relays of conducting respectively; make data collector, subscriber's meter tool and equipment form the information transmission path, as shown in Figure 9 by bus.Check meter finish after, the base stage input high level control signal of this system triode in two groups of ECU (Electrical Control Unit) 3, triode in the two groups of ECU (Electrical Control Unit) normally opened contact closure of two relays of conducting respectively makes bus short circuit, and long-distance meter-reading system promptly is in idle state, as shown in Figure 8.
Claims (5)
1. the guard method of a long-distance meter-reading system; it is characterized in that described method is on the bus loop that connects data collector and subscriber's meter tool and equipment the electronic type protective device to be set; by electric signal control electronic type protective device; when being in idle state, system makes bus short circuit; be in system and recover the bus working method when checking meter state, make data collector, subscriber's meter tool and equipment form the information transmission path by bus.
2. the guard method of long-distance meter-reading system according to claim 1; it is characterized in that described electronic type protective device (1) comprises relay (2) and ECU (Electrical Control Unit) (3); relay is installed on the bus loop that connects data collector and subscriber's meter tool and equipment, and ECU (Electrical Control Unit) is connected with the coil of relay.
3. the guard method of long-distance meter-reading system according to claim 2 is characterized in that relay (2) is a dpdt relay, and ECU (Electrical Control Unit) (3) is one group.
4. the guard method of long-distance meter-reading system according to claim 2; it is characterized in that relay (2) is made up of two single-pole single-throw (SPST) relays; ECU (Electrical Control Unit) (3) is two groups; two groups of ECU (Electrical Control Unit) are connected with the relay coil of control separately respectively, and the signal input end parallel connection of two groups of ECU (Electrical Control Unit).
5. according to the guard method of the described long-distance meter-reading system of arbitrary claim in the claim 2 to 4, it is characterized in that the on-off circuit that ECU (Electrical Control Unit) (3) is formed for triode, diode and stake resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910058626 CN101504793B (en) | 2009-03-18 | 2009-03-18 | Protection method for remote meter reading system and electronic protection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910058626 CN101504793B (en) | 2009-03-18 | 2009-03-18 | Protection method for remote meter reading system and electronic protection device |
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| CN101504793A CN101504793A (en) | 2009-08-12 |
| CN101504793B true CN101504793B (en) | 2010-11-10 |
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| CN109360404B (en) * | 2018-12-13 | 2023-08-15 | 湖南常德牌水表制造有限公司 | Multichannel intelligent meter reading remote transmission device and method for M-Bus master station |
| CN113624929B (en) * | 2021-10-12 | 2022-01-25 | 成都千嘉科技有限公司 | Full-range automatic calibration method for gas sensor |
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Address after: 610211, No. 1, 1 section, Airport Road, Chengdu, Shuangliu County, Sichuan, 536 Patentee after: Chengdu Qianjia Technology Co.,Ltd. Address before: 610211, No. 1, 1 section, Airport Road, Chengdu, Shuangliu County, Sichuan, 536 Patentee before: Chengdu Qianjia Technology Co.,Ltd. |
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