技术领域technical field
本实用新型属于信号传递与通道自检电路，尤其涉及列车运行中测试行驶速度的速度传感器的信号传递与通道自检电路。The utility model belongs to a signal transmission and channel self-inspection circuit, in particular to a signal transmission and channel self-inspection circuit of a speed sensor for testing running speed during train operation.
背景技术Background technique
LIJ列车运行中，测试速度的速度传感器时刻运转，然后定时采集速度信号传递给LKJ的列车运行监控系统进行分析，通常情况下，可以无故障的传递到监控系统的CPU中，但是当碰到故障时，如发生跳变或者信号传输通道发生问题或者外部设备发生故障时，信号传递不到CPU中，会发生CPU接收到的数据为零或者异常的情况，此时，后台监控系统只能发现某时刻或者某时间段内发生故障，但是，并不能确定故障发生在外部设备还是发生在通道中，因此需要对传递速度信号的通道进行自检，但是现有的速度传递电路中没有设置对通道进行自检的电路。During the operation of LIJ train, the speed sensor for testing the speed is running all the time, and then collects the speed signal regularly and transmits it to the train operation monitoring system of LKJ for analysis. Normally, it can be transmitted to the CPU of the monitoring system without failure, but when there is a failure When there is a jump or a problem in the signal transmission channel or an external device fails, the signal cannot be transmitted to the CPU, and the data received by the CPU will be zero or abnormal. At this time, the background monitoring system can only find a certain A fault occurs at any time or within a certain period of time. However, it is not possible to determine whether the fault occurs in the external device or in the channel. Therefore, it is necessary to perform self-test on the channel transmitting the speed signal, but the existing speed transmission circuit does not set the channel. self-test circuit.
实用新型内容Utility model content
本实用新型的目的在于提供一种可以对通道进行自检信号传递电路，以解决现有技术存在的问题。The purpose of the utility model is to provide a signal transmission circuit capable of self-checking the channel, so as to solve the problems in the prior art.
为解决上述技术问题，本实用新型采用以下技术方案：In order to solve the above technical problems, the utility model adopts the following technical solutions:
一种信号传递与通道自检电路，包括与信号传输通道对应的至少一个电路结构，每个电路结构均包括与速度传感器相连的信号调理电路，信号调理电路与模拟开关电路相连，模拟开关电路与磁隔离装置Ⅰ和磁隔离装置Ⅱ相连，磁隔离装置Ⅰ和磁隔离装置Ⅱ与处理器相连。A signal transmission and channel self-inspection circuit, including at least one circuit structure corresponding to the signal transmission channel, each circuit structure includes a signal conditioning circuit connected to a speed sensor, the signal conditioning circuit is connected to an analog switch circuit, and the analog switch circuit is connected to the The magnetic isolation device I is connected to the magnetic isolation device II, and the magnetic isolation device I and the magnetic isolation device II are connected to the processor.
所述速度传感器为两个，每个速度传感器均与一个信号调理电路相连，两个信号调理电路与一个模拟开关电路相连。There are two speed sensors, each speed sensor is connected with a signal conditioning circuit, and the two signal conditioning circuits are connected with an analog switch circuit.
所述模拟开关电路为双通道单刀双掷电路。The analog switch circuit is a double-channel single-pole double-throw circuit.
本实用新型的有益效果：本实用新型可以检测信号通道是否正常，有助于及时发现故障并最小化损失。并且采用磁隔离电路，相对于现有电路中光耦隔离，功耗低，受温度影响小，结果可靠稳定。Beneficial effects of the utility model: the utility model can detect whether the signal channel is normal, which helps to find faults in time and minimize losses. In addition, the magnetic isolation circuit is adopted. Compared with the optocoupler isolation in the existing circuit, the power consumption is low, the influence of temperature is small, and the result is reliable and stable.
附图说明Description of drawings
图1为本实用新型的电路图。Fig. 1 is the circuit diagram of the utility model.
具体实施方式Detailed ways
下面结合附图和具体实施方式对本实用新型作进一步详细说明。The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment.
本实用新型提供一种信号传递与通道自检电路，主要用于将LKJ中检测车速的速度传感器检测到的信号传递给CPU处理器，并且在信号的传递出现障碍的时候，对信号传递的通道进行检测，排查是否属于信号传递的通道的故障导致的信号传递出现问题。根据速度传感器的数目，应该包括至少一个电路结构，每个电路结构均包括与速度传感器相连的信号调理电路，信号调理电路与模拟开关电路相连，模拟开关电路与磁隔离装置Ⅰ和磁隔离装置Ⅱ相连，磁隔离装置Ⅰ和磁隔离装置Ⅱ与处理器相连。如图1所示，在每个电路结构中，连接的速度传感器的数目为两个，两个速度传感器通过各自的速度传感器输入通道SD1和SD2将信号分别传递给两个信号调理电路U3和U5，信号调理电路将信号经过放大、滤波等处理以后，将处理过后的两路速度信号通过一个模拟量开关电路U2传递给磁隔离装置ⅠU1，磁隔离装置ⅠU1将信号传递给CPU处理器进行处理。当发生故障CPU无法接受速度信号或者接受到异常的速度信号时，CPU发出一个测试信号反向传递给磁隔离装置ⅠU1，磁隔离装置ⅠU1将信号传递到模拟开关电路U2，模拟开关电路U2是一个单刀双掷开关电路，它将两路信号调理电路传递的信号断开，将接收的磁隔离装置ⅠU1传递的信号传递到磁隔离装置ⅡU4，磁隔离装置ⅡU4将测试信号重新传递给CPU，CPU判断传回的信号与传出的信号是否有异常，即比较传回的信号是否在正常值范围内，如果在正常值范围内，则表示通道正常，否则表示通道出现问题。The utility model provides a signal transmission and channel self-inspection circuit, which is mainly used to transmit the signal detected by the speed sensor for detecting the vehicle speed in LKJ to the CPU processor, and when there is an obstacle in the signal transmission, the signal transmission channel Perform detection to check whether there is a problem with signal transmission caused by a fault in the signal transmission channel. According to the number of speed sensors, it should include at least one circuit structure, each circuit structure includes a signal conditioning circuit connected to the speed sensor, the signal conditioning circuit is connected to the analog switch circuit, and the analog switch circuit is connected to the magnetic isolation device I and the magnetic isolation device II The magnetic isolation device I and the magnetic isolation device II are connected to the processor. As shown in Figure 1, in each circuit structure, the number of connected speed sensors is two, and the two speed sensors transmit signals to two signal conditioning circuits U3 and U5 respectively through their respective speed sensor input channels SD1 and SD2 After the signal conditioning circuit amplifies and filters the signals, the processed two speed signals are transmitted to the magnetic isolation device IU1 through an analog switch circuit U2, and the magnetic isolation device IU1 transmits the signals to the CPU processor for processing. When a fault occurs and the CPU cannot receive the speed signal or receives an abnormal speed signal, the CPU sends a test signal and transmits it back to the magnetic isolation device IU1, and the magnetic isolation device IU1 transmits the signal to the analog switch circuit U2, and the analog switch circuit U2 is a Single-pole double-throw switch circuit, which disconnects the signals transmitted by the two signal conditioning circuits, and transmits the received signal transmitted by the magnetic isolation device ⅠU1 to the magnetic isolation device ⅡU4, and the magnetic isolation device ⅡU4 retransmits the test signal to the CPU, and the CPU judges Whether there is any abnormality between the returned signal and the outgoing signal, that is, compare whether the returned signal is within the normal value range. If it is within the normal value range, it means that the channel is normal, otherwise it means that there is a problem with the channel.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520671800.6UCN204904559U (en) | 2015-09-01 | 2015-09-01 | Signal transmission and passageway self checking circuit |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520671800.6UCN204904559U (en) | 2015-09-01 | 2015-09-01 | Signal transmission and passageway self checking circuit |
| Publication Number | Publication Date |
|---|---|
| CN204904559Utrue CN204904559U (en) | 2015-12-23 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520671800.6UExpired - LifetimeCN204904559U (en) | 2015-09-01 | 2015-09-01 | Signal transmission and passageway self checking circuit |
| Country | Link |
|---|---|
| CN (1) | CN204904559U (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884595A (en)* | 2016-12-29 | 2018-04-06 | 比亚迪股份有限公司 | Vehicle, speed acquisition device and its self-checking unit and self checking method |
| CN111122908A (en)* | 2019-12-30 | 2020-05-08 | 中国科学院工程热物理研究所 | Circuit design device and method for self-detecting faults of aircraft engine speed sensor |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884595A (en)* | 2016-12-29 | 2018-04-06 | 比亚迪股份有限公司 | Vehicle, speed acquisition device and its self-checking unit and self checking method |
| CN111122908A (en)* | 2019-12-30 | 2020-05-08 | 中国科学院工程热物理研究所 | Circuit design device and method for self-detecting faults of aircraft engine speed sensor |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | Granted publication date:20151223 | |
| CX01 | Expiry of patent term |