CN204241026U - A kind of chromacoder - Google Patents
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Abstract
本实用新型提供一种信号转换装置，应用于电力系统水电厂的现场试验，所述信号转换装置包括电源、输入输出接口、供电和传感器型式切换模块和隔离器，供电和传感器型式切换模块一端与输入输出接口连接，输入输出接口用于与电涡流位移传感器输出端、压力变送器输出端和机组现地控制单元输入端连接，供电和传感器型式切换模块另一端还分别与电源和隔离器连接，电源还与隔离器连接。本实用新型信号转换装置保证了现场试验过程中机组设备的安全运行，并且能够提高现场试验的效率和可靠性。
The utility model provides a signal conversion device, which is applied to the field test of a power system hydropower plant. The signal conversion device includes a power supply, an input and output interface, a power supply and sensor type switching module and an isolator, and one end of the power supply and sensor type switching module is connected to the Input and output interface connection, the input and output interface is used to connect with the output end of the eddy current displacement sensor, the output end of the pressure transmitter and the input end of the local control unit of the unit, and the other end of the power supply and sensor type switching module is also connected with the power supply and the isolator respectively , the power supply is also connected with the isolator. The signal conversion device of the utility model ensures the safe operation of unit equipment in the field test process, and can improve the efficiency and reliability of the field test.
Description
技术领域 technical field
本实用新型涉及电力系统水电厂现场试验领域，更具体地，涉及一种信号转换装置。 The utility model relates to the field test field of a power system hydroelectric power plant, in particular to a signal conversion device.
背景技术 Background technique
电力系统的现场试验是保障电力系统水电厂安全、稳定运行的必要措施，现场试验常常需要对电涡流位移传感器信号、压力变送器信号和机组现地控制单元输出的工况信号进行采集和分析。 The field test of the power system is a necessary measure to ensure the safe and stable operation of the power system hydropower plant. The field test often needs to collect and analyze the signals of the eddy current displacement sensor, the signal of the pressure transmitter and the working condition signal output by the local control unit of the unit. .
现场试验时采用的压力变送器多为两线制、标准电流输出型式，其供电电源为+24VDC。现场试验时采用的电涡流位移传感器为三线制、4~20mA输出或者负电压输出两种型式，其供电电源为+24VDC或-24VDC。压力变送器和机组现地控制单元的输出均为电流信号，由于机组稳定性测试仪通道输入类型是电压型，故需进行电流-电压转换，以往采用的方法是在压力变送器和涡流位移传感器的供电电路线缆中串联一个标准精密电阻，再通过一根线缆并联在电阻上引出电压信号，将电压信号输入测试仪；现场试验时需要通过机组现地控制单元接入机组工况信号，如机组转速、有功功率以及出口断路器开关信号等，压力变送器和电涡流位移传感器也与机组设备相连接，一旦测试仪器发生异常情况时可能会影响机组的安全运行。 Most of the pressure transmitters used in field tests are two-wire system and standard current output type, and their power supply is +24VDC. The eddy current displacement sensor used in the field test is three-wire system, 4~20mA output or negative voltage output, and its power supply is +24VDC or -24VDC. Both the output of the pressure transmitter and the local control unit of the unit are current signals. Since the channel input type of the unit stability tester is a voltage type, it is necessary to perform current-voltage conversion. A standard precision resistor is connected in series in the power supply circuit cable of the displacement sensor, and then a voltage signal is drawn out from the resistor in parallel through a cable, and the voltage signal is input to the tester; the field test needs to be connected to the working condition of the unit through the local control unit of the unit. Signals, such as unit speed, active power, and outlet circuit breaker switch signals, etc., pressure transmitters and eddy current displacement sensors are also connected to the unit equipment. Once the test instrument is abnormal, it may affect the safe operation of the unit.
实用新型内容 Utility model content
本实用新型为克服上述现有技术所述的至少一种缺陷，提供一种安全、使用方便的信号转换装置。 The utility model provides a safe and easy-to-use signal conversion device to overcome at least one defect of the above-mentioned prior art.
一种信号转换装置，应用于电力系统水电厂的现场试验，所述现场试验采集电涡流位移传感器、压力变送器和机组现地控制单元的输出信号，上述信号通过信号转换装置连接到机组稳定性测试仪，机组稳定性测试仪对上述信号进行检测，所述信号转换装置包括电源、输入输出接口、供电和传感器型式切换模块和隔离器，供电和传感器型式切换模块一端与输入输出接口连接，输入输出接口用于与电涡流位移传感器输出端、压力变送器输出端和机组现地控制单元输出端连接，供电和传感器型式切换模块另一端还分别与电源和隔离器连接，电源还与隔离器连接。 A signal conversion device, applied to the field test of the power system hydropower plant, the field test collects the output signals of the eddy current displacement sensor, the pressure transmitter and the local control unit of the unit, and the above-mentioned signals are connected to the stable unit of the unit through the signal conversion device The above-mentioned signal is detected by the unit stability tester. The signal conversion device includes a power supply, an input and output interface, a power supply and sensor type switching module and an isolator, and one end of the power supply and sensor type switching module is connected to the input and output interface. The input and output interfaces are used to connect with the output end of the eddy current displacement sensor, the output end of the pressure transmitter and the output end of the local control unit of the unit. device connection.
在一种优选的方案中，所述供电和传感器型式切换模块包括多个拨码开关，所述电涡流位移传感器输出端通过拨码开关和隔离器与机组稳定性测试仪输入端连接，实现电涡流位移传感器的输出与机组稳定性测试仪的隔离以及电流-电压的转换。 In a preferred solution, the power supply and sensor type switching module includes a plurality of dial switches, and the output end of the eddy current displacement sensor is connected to the input end of the unit stability tester through a dial switch and an isolator to realize electrical The output of the eddy current displacement sensor is isolated from the unit stability tester and the conversion of current to voltage.
在一种优选的方案中，所述压力变送器输出端通过隔离器与机组稳定性测试仪输入端连接，实现压力变送器的输出与机组稳定性测试仪的隔离以及电流-电压的转换。 In a preferred solution, the output end of the pressure transmitter is connected to the input end of the unit stability tester through an isolator, so as to realize the isolation between the output of the pressure transmitter and the unit stability tester and the conversion of current to voltage .
在一种优选的方案中，所述机组现地控制单元输出端通过隔离器与机组稳定性测试仪输入端连接，实现机组现地控制单元的输出与机组稳定性测试仪的隔离以及电流-电压的转换。 In a preferred solution, the output end of the local control unit of the unit is connected to the input end of the unit stability tester through an isolator, so as to realize the isolation between the output of the local control unit of the unit and the stability tester of the unit and the current-voltage conversion.
在一种优选的方案中，所述电源分别提供+24V和-24V直流电源，所述电涡流位移传感器通过拨码开关与电源连接，通过拨码开关实现电涡流位移传感器的供电电压的切换。 In a preferred solution, the power supply provides +24V and -24V DC power respectively, the eddy current displacement sensor is connected to the power supply through a dial switch, and the power supply voltage of the eddy current displacement sensor is switched through the dial switch.
在一种优选的方案中，连接压力变送器输出端、机组现地控制单元输出端和机组稳定性测试仪输入端与供电和传感器型式切换模块3的输入输出接口2采用BNC插头。 In a preferred solution, a BNC plug is used to connect the output end of the pressure transmitter, the output end of the local control unit of the unit, the input end of the unit stability tester, and the input and output interface 2 of the power supply and sensor type switching module 3 .
在一种优选的方案中，连接电涡流传感器输出端与供电和传感器型式切换模块3的输入输出接口2采用4针航空插头。 In a preferred solution, a 4-pin aviation plug is used to connect the output terminal of the eddy current sensor to the input and output interface 2 of the power supply and sensor type switching module 3 .
在一种优选的方案中，所述输入输出接口、供电和传感器型式切换模块集成与一块PCB板上。 In a preferred solution, the input and output interface, power supply and sensor type switching modules are integrated on one PCB.
在一种优选的方案中，所述隔离器采用标准信号隔离器，其型号为VariTrans PH15000H1。 In a preferred solution, the isolator is a standard signal isolator whose model is VariTrans PH15000H1.
在一种优选的方案中，所述电源模块采用2个Phoenix开关电源，分别提供+24V和-24V直流电源。 In a preferred solution, the power supply module uses two Phoenix switching power supplies to provide +24V and -24V DC power supplies respectively.
与现有技术相比，本实用新型技术方案的有益效果是：本实用新型信号转换装置，供电和传感器型式切换模块一端与输入输出接口连接，输入输出接口用于与电涡流位移传感器输出端、压力变送器输出端和机组现地控制单元输出端连接，供电和传感器型式切换模块另一端还分别与电源和隔离器连接，供电和传感器型式切换模块通过隔离器实现各信号的输出与机组稳定性测试仪隔离，由于机组现地控制单元与机组设备连接，所以其与机组稳定性测试仪的隔离保证了现场试验过程中机组设备的安全运行；隔离器同时还实现了电流-电压的转换，保证了机组稳定性测试仪的正常检测；此外供电和传感器型式切换模块能够还实现对电涡流位移传感器供电电压的切换。 Compared with the prior art, the beneficial effect of the technical solution of the utility model is: the signal conversion device of the utility model, one end of the power supply and sensor type switching module is connected to the input and output interface, and the input and output interface is used to connect with the output terminal of the eddy current displacement sensor, The output end of the pressure transmitter is connected to the output end of the local control unit of the unit, and the other end of the power supply and sensor type switching module is also connected to the power supply and the isolator respectively. The power supply and sensor type switching module realizes the output of each signal and the stability of the unit through the isolator Isolation of the stability tester, because the local control unit of the unit is connected with the unit equipment, so its isolation from the unit stability tester ensures the safe operation of the unit equipment during the field test; the isolator also realizes the current-voltage conversion, The normal detection of the unit stability tester is guaranteed; in addition, the power supply and sensor type switching module can also realize the switching of the power supply voltage of the eddy current displacement sensor.
附图说明 Description of drawings
图1为本实用新型信号转换装置的示意图。 FIG. 1 is a schematic diagram of a signal conversion device of the present invention.
图2为本实用新型供电和传感器型式切换模块与电涡流位移传感器和机组稳定性测试仪的连接示意图。 Figure 2 is a schematic diagram of the connection between the power supply and sensor type switching module of the present invention, the eddy current displacement sensor and the unit stability tester.
图3为本实用新型供电和传感器型式切换模块与压力变送器、机组现地控制单元和机组稳定性测试仪的连接示意图。 Figure 3 is a schematic diagram of the connection between the power supply and sensor type switching module of the utility model, the pressure transmitter, the local control unit of the unit and the stability tester of the unit.
图4为本实用新型供电和传感器型式切换模块的电路原理图。 Fig. 4 is a schematic circuit diagram of the power supply and sensor type switching module of the utility model.
1、电源；2、输入输出接口；3、供电和传感器型式切换模块；4、隔离器。 1. Power supply; 2. Input and output interfaces; 3. Power supply and sensor type switching module; 4. Isolator.
具体实施方式 Detailed ways
附图仅用于示例性说明，不能理解为对本专利的限制； The accompanying drawings are for illustrative purposes only and cannot be construed as limiting the patent;
为了更好说明本实施例，附图某些部件会有省略、放大或缩小，并不代表实际产品的尺寸；对于本领域技术人员来说，附图中某些公知结构及其说明可能省略是可以理解的。 In order to better illustrate this embodiment, some components in the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, some known structures and their descriptions in the drawings may be omitted. understandable.
下面结合附图和实施例对本实用新型的技术方案做进一步的说明。 The technical scheme of the utility model is further described below in conjunction with the accompanying drawings and embodiments.
实施例1 Example 1
如图1-3所示，一种信号转换装置，应用于电力系统水电厂的现场试验，所述现场试验采集电涡流位移传感器、压力变送器和机组现地控制单元的输出信号，机组现地控制单元输出机组设备的工况信号，上述信号通过信号转换装置连接到机组稳定性测试仪，机组稳定性测试仪对上述信号进行检测，所述信号转换装置包括电源1、输入输出接口2、供电和传感器型式切换模块3和隔离器4，供电和传感器型式切换模块3一端与输入输出接口2连接，输入输出接口2用于与电涡流位移传感器输出端、压力变送器输出端和机组现地控制单元输出端连接，供电和传感器型式切换模块3另一端还分别与电源1和隔离器4连接，电源1还与隔离器4连接为其提供工作电压。 As shown in Figure 1-3, a signal conversion device is applied to the field test of the power system hydropower plant. The field test collects the output signals of the eddy current displacement sensor, the pressure transmitter and the local control unit of the unit. The ground control unit outputs the working condition signal of the unit equipment. The above signal is connected to the unit stability tester through the signal conversion device, and the unit stability tester detects the above signal. The signal conversion device includes a power supply 1, an input and output interface 2, The power supply and sensor type switching module 3 and the isolator 4, one end of the power supply and sensor type switching module 3 is connected to the input and output interface 2, and the input and output interface 2 is used to connect with the output end of the eddy current displacement sensor, the output end of the pressure transmitter and the current unit. The output end of the ground control unit is connected, and the other end of the power supply and sensor type switching module 3 is also connected to the power supply 1 and the isolator 4 respectively, and the power supply 1 is also connected to the isolator 4 to provide it with working voltage.
在具体实施过程中，所述供电和传感器型式切换模块3包括8个8 位的拨码开关，所述电涡流位移传感器输出端通过拨码开关和隔离器4与机组稳定性测试仪输入端连接，实现电涡流位移传感器的输出与机组稳定性测试仪的隔离以及电流-电压的转换；所述压力变送器输出端通过隔离器4与机组稳定性测试仪输入端连接，实现压力变送器的输出与机组稳定性测试仪的隔离以及电流-电压的转换；所述机组现地控制单元输出端通过隔离器4与机组稳定性测试仪输入端连接，实现机组现地控制单元的输出与机组稳定性测试仪的隔离以及电流-电压的转换。 In the specific implementation process, the power supply and sensor type switching module 3 includes 8 8-bit dial switches, and the output end of the eddy current displacement sensor is connected to the input end of the unit stability tester through the dial switch and isolator 4 to realize the isolation between the output of the eddy current displacement sensor and the unit stability tester and the conversion of current-voltage; the output end of the pressure transmitter is connected to the input end of the unit stability tester through the isolator 4 to realize the The output of the unit is isolated from the unit stability tester and the conversion of current-voltage; the output end of the unit local control unit is connected with the input end of the unit stability tester through the isolator 4 to realize the output of the unit local control unit and the unit Isolation and current-to-voltage conversion of stability testers.
在具体实施过程中，电源1采用2个Phoenix开关电源，分别提供+24V和-24V直流电源，所述电涡流位移传感器通过拨码开关与电源1连接，通过拨码开关实现电涡流位移传感器的供电电压在+24V和-24V之间切换。 In the specific implementation process, the power supply 1 uses two Phoenix switching power supplies to provide +24V and -24V DC power supplies respectively. The supply voltage is switchable between +24V and -24V.
供电和传感器型式切换模块3原理图如图4所示，图中D1~D8为8位拨码开关，J1~J6为8位针排插接件，P1~P6为12位固定耳插拔式连接器；其中J1~J2连接压力变送器，J3~J6连接电涡流位移传感器，P1~P2连接机组稳定性测试仪，P3~P6连接隔离器4。 The schematic diagram of power supply and sensor type switching module 3 is shown in Figure 4. In the figure, D1~D8 are 8-bit DIP switches, J1~J6 are 8-bit pin row connectors, and P1~P6 are 12-bit fixed ear plug-in type Connectors; J1~J2 are connected to the pressure transmitter, J3~J6 are connected to the eddy current displacement sensor, P1~P2 are connected to the unit stability tester, and P3~P6 are connected to the isolator 4.
在具体实施过程中，所述输入输出接口2为标准接口，连接压力变送器输出端、机组现地控制单元输出端和机组稳定性测试仪输入端与供电和传感器型式切换模块3的输入输出接口2采用BNC插头，连接电涡流传感器输出端与供电和传感器型式切换模块3的输入输出接口2采用4针航空插头。 In the specific implementation process, the input and output interface 2 is a standard interface, which is connected to the output terminal of the pressure transmitter, the output terminal of the local control unit of the unit, the input terminal of the unit stability tester, and the input and output of the power supply and sensor type switching module 3 The interface 2 adopts a BNC plug, and the input and output interface 2 connecting the output terminal of the eddy current sensor with the power supply and sensor type switching module 3 adopts a 4-pin aviation plug.
输入输出接口采用标准接口，在连接电涡流位移传感器、压力变送器和机组现地控制单元的工况信号时，能够保证连接的快速和准确，减轻工作人员的负担，提高现场试验的效率和可靠性。 The input and output interfaces adopt standard interfaces. When connecting the eddy current displacement sensor, pressure transmitter and the working condition signal of the local control unit of the unit, it can ensure fast and accurate connection, reduce the burden on the staff, and improve the efficiency and efficiency of the field test. reliability.
在具体实施过程中，所述输入输出接口2和供电和传感器型式切换模块3集成与一块PCB板上，电路板铜箔厚度1oz（35μm），理论上1mm线宽可承载1A电流，其他参数如下所示：板厚1.6mm，材质为FR-4，阻焊颜色为绿油白字，焊盘为有铅喷锡，过孔盖油处理。 In the specific implementation process, the input and output interface 2 and the power supply and sensor type switching module 3 are integrated on a PCB board. The thickness of the copper foil on the circuit board is 1 oz (35 μm). Theoretically, the line width of 1 mm can carry 1 A current. Other parameters are as follows Shown: board thickness is 1.6mm, material is FR-4, solder resist color is green and white, pads are leaded tin-sprayed, and via holes are covered with oil.
在具体实施过程中，所述隔离器4采用标准信号隔离器VariTrans PH15000H1。 In the specific implementation process, the isolator 4 uses a standard signal isolator VariTrans PH15000H1.
本实用新型信号转换装置，供电和传感器型式切换模块一端与输入输出接口连接，输入输出接口用于与电涡流位移传感器输出端、压力变送器输出端和机组现地控制单元输出端连接，供电和传感器型式切换模块另一端还分别与电源和隔离器连接，供电和传感器型式切换模块通过隔离器实现各信号的输出与机组稳定性测试仪隔离，由于机组现地控制单元与机组设备连接，所以其与机组稳定性测试仪的隔离保证了现场试验过程中机组设备的安全运行；隔离器同时还实现了电流-电压的转换，保证了机组稳定性测试仪的正常检测；此外供电和传感器型式切换模块能够还实现对电涡流位移传感器供电电压的切换。 In the signal conversion device of the utility model, one end of the power supply and sensor type switching module is connected to the input and output interface, and the input and output interface is used to connect with the output end of the eddy current displacement sensor, the output end of the pressure transmitter, and the output end of the local control unit of the unit. The other end of the sensor type switching module is also connected to the power supply and the isolator respectively. The power supply and sensor type switching module realizes the isolation of each signal output from the unit stability tester through the isolator. Since the unit local control unit is connected to the unit equipment, so Its isolation from the unit stability tester ensures the safe operation of the unit equipment during the field test; the isolator also realizes the current-voltage conversion, ensuring the normal detection of the unit stability tester; in addition, the power supply and sensor type switching The module can also realize switching of the power supply voltage of the eddy current displacement sensor. the
相同或相似的标号对应相同或相似的部件； The same or similar reference numerals correspond to the same or similar components;
附图中描述位置关系的用语仅用于示例性说明，不能理解为对本专利的限制； The terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be interpreted as limitations on this patent;
显然，本实用新型的上述实施例仅仅是为清楚地说明本实用新型所作的举例，而并非是对本实用新型的实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。凡在本实用新型的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本实用新型权利要求的保护范围之内。 Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. For those of ordinary skill in the art, on the basis of the above description, other changes or changes in different forms can also be made. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the utility model shall be included in the protection scope of the claims of the utility model.
Claims (10)
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| CN201420677347.5U CN204241026U (en) | 2014-11-13 | 2014-11-13 | A kind of chromacoder |
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| CN201420677347.5U CN204241026U (en) | 2014-11-13 | 2014-11-13 | A kind of chromacoder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105823500A (en) * | 2016-05-11 | 2016-08-03 | 中国船舶重工集团公司第七�三研究所 | Transmitter interface type |
| CN105911468A (en) * | 2016-04-28 | 2016-08-31 | 北京中水科水电科技开发有限公司 | Uniform accessing apparatus for onsite test parameters for waterpower set |
| CN107727896A (en) * | 2017-11-13 | 2018-02-23 | 广东电网有限责任公司电力科学研究院 | A kind of multi channel signals conversion equipment |
| CN108489662A (en) * | 2018-04-26 | 2018-09-04 | 广东蓄能发电有限公司 | A kind of pressure transmitter interface switching device |
-
2014
- 2014-11-13 CN CN201420677347.5U patent/CN204241026U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911468A (en) * | 2016-04-28 | 2016-08-31 | 北京中水科水电科技开发有限公司 | Uniform accessing apparatus for onsite test parameters for waterpower set |
| CN105823500A (en) * | 2016-05-11 | 2016-08-03 | 中国船舶重工集团公司第七�三研究所 | Transmitter interface type |
| CN105823500B (en) * | 2016-05-11 | 2017-10-31 | 中国船舶重工集团公司第七�三研究所 | Transmitter interface device |
| CN107727896A (en) * | 2017-11-13 | 2018-02-23 | 广东电网有限责任公司电力科学研究院 | A kind of multi channel signals conversion equipment |
| CN108489662A (en) * | 2018-04-26 | 2018-09-04 | 广东蓄能发电有限公司 | A kind of pressure transmitter interface switching device |
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Effective date of registration: 20181221 Address after: 510630 room 2201, Longkou East Road, Tianhe District, Guangzhou, Guangdong, 2201 Patentee after: SOUTHERN POWER GRID PEAK LOAD AND FREQUENCY REGULATION POWER GENERATION Co.,Ltd. Address before: 510643 32, Longkou East Road, Tianhe District, Guangzhou, Guangdong. Patentee before: China Southern Power Grid Tiaofeng Frequency Modulation Power Generation Company |
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