Multiplex device for single bus interface signal ground
A technology for multiplexing devices and interface signals, applied in the field of circuit systems, can solve the problems of increasing the cost of remote separation heating control, and achieve the effects of obvious improvement in cost and reliability, simplified connection mode, and obvious benefits.
Active Publication Date: 2009-12-30
北京谊安和瑞技术有限公司
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Problems solved by technology
[0007] In the above technologies, the heating control, temperature sampling, and current sampling generally require more than 3 lines of interfaces, thus increasing the cost of remote separation heating control
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[0026] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0027] Figure 4 is a block diagram of an apparatus 400 according to the invention.
[0028] Such as Figure 4 As shown, the device 400 includes a module to be tested 402; a sensor 404 for sensing physical parameters of the module to be tested 402; a controller 408 connected to one end of the module to be tested 402 and one end of the sensor 404 for receiving the sensor 404 The sensing signal and control the work of the module under test 402; wherein, the other end of the module under test 402 is connected to the ground through the resistor 406, and the other end of the sensor 404 is connected to the ground through the resistor 406.
[0029] According to the multi...
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The invention provides a multiplex device for a single bus interface signal ground. The multiplex device comprises a module to be detected, a sensor and a controller, wherein the sensor is used for sensing physical parameters of the module to be detected; the controller is connected to one end of the module to be detected and one end of the sensor and used for receiving sensing signals of the sensor and controlling the work of the module to be detected; and the other end of the module to be detected is connected with the ground through a resistor, and the other end of the sensor is connected with the ground through a resistor. Therefore, by using the device of the invention, under the condition that the resistors do not influence the heating current and the signal transmission of measuring control, a current feedback signal wire can be used as the ground of a heater and the sensor so as to realize the simplification of the interface; and the functions of heating control, temperature sampling and current sampling can be realized only by using three wires.
Description
technical field [0001] The present invention relates to a circuit system, and more specifically, to a multiplexing device for a signal ground of a single-bus interface. Background technique [0002] figure 1 It is a schematic diagram of the heating and temperature measuring circuit in the prior art. [0003] Such as figure 1 As shown, a typical heating control system includes two parts: a heating control loop and a temperature feedback loop. In the conventional method, the heating current signal is detected by connecting a small resistor Rs in series on the heating circuit, which adds a resistor to the ground, which is equivalent to increasing the internal resistance of the system, so the temperature detection signal passes through a A separate ground wire is used to form the loop. [0004] figure 2 It is a specific circuit schematic diagram with current feedback in the prior art. [0005] image 3 It is a specific heating and temperature measuring circuit diagram in...
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Login to View More IPC IPC(8): G05B19/02G01R19/00G01K13/00
Inventor 杨洪刚
Owner 北京谊安和瑞技术有限公司