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Power voltage measuring device, temperature detecting device comprising same, and temperature controller

A technology for measuring power supply and power supply. It is applied in the direction of measuring current/voltage, measuring devices, and adopting electrical devices. It can solve the problems of high cost, multiple resources of chips, and inability to guarantee the excellent performance of chips, and achieve the effect of avoiding resources.

Inactive Publication Date: 2014-09-24
EMERSON ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, in the chip that is provided with power supply voltage indicator in the prior art, the element of described power supply voltage indicator is integrated inside the chip, will occupy more resources inside the chip, and this will not be able to guarantee the excellent performance of the chip, simultaneously , the chip with the power supply voltage indicator has a higher cost, which is not conducive to production and sales

Method used

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  • Power voltage measuring device, temperature detecting device comprising same, and temperature controller
  • Power voltage measuring device, temperature detecting device comprising same, and temperature controller
  • Power voltage measuring device, temperature detecting device comprising same, and temperature controller

Examples

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Embodiment 1

[0051] The embodiment of the present invention protects a device for measuring the power supply voltage. The device for measuring the power supply voltage can be used on a chip. There is no power supply voltage indicator dedicated to detecting the power supply voltage in the chip, but the circuit can still be detected. The voltage value of the power supply. Specifically, the device for measuring the power supply voltage can calculate the voltage value of the power supply through a comparator in other modules on the chip and related components already in some circuits. figure 2 A device for measuring the power supply voltage of this embodiment is shown, including a resistor 22 electrically connected to the power source 21; a capacitor 23 electrically connected to the resistor 22 at one end and grounded at the other end; and a control device 20 electrically connected to the power source 21 , The control device 20 includes a comparator 24 connected to the capacitor 23, a reference...

Embodiment 2

[0059] The embodiment of the present invention provides another device for measuring power supply voltage, including a resistor 32 electrically connected to the power source 31; a capacitor 33 electrically connected to the resistor 32 at one end and grounded at the other end; and a control device 30 electrically connected to the power source 31 , The control device 30 includes a comparator 34 connected to the capacitor, a reference voltage source connected to the comparator 34, a timer 36 and a calculation unit 37; Figure 4 A device for measuring a voltage power supply of one of the embodiments is shown.

[0060] The reference voltage source includes an absolute reference voltage source 38 and a relative reference voltage source 39, and the control device 30 can control the comparator 34 to be connected to the absolute reference voltage source 38 or the relative reference voltage source 39;

[0061] Specifically, when the control device 30 is switched through a switch element 35 so...

Embodiment 3

[0080] The embodiment of the present invention also provides a detection device, which includes the device in Embodiment 1 or Embodiment 2. The detection device further includes a chip, and the chip further includes a temperature detector 40 which can detect the temperature of the chip. Figure 7 A detection device in this embodiment is shown. At the same time, the calculation unit 47 in this embodiment can obtain the voltage value of the absolute reference voltage source 48 in the above embodiment by looking up the temperature value of the chip. The detection device in this embodiment does not need to be provided with an indicator dedicated to indicating the voltage value of the absolute reference voltage source on the chip when measuring voltage, which reduces the use of resources on the chip.

[0081] Specifically, first obtain the approximate voltage value of the absolute reference voltage source through the temperature compensation method, and then use the table look-up metho...

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PUM

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Abstract

The invention relates to a power voltage measuring device, a temperature detecting device comprising same, and a temperature controller. The power voltage measuring device comprises a resistor, a capacitor and a control device; the control device comprises a comparator that is connected with the capacitor, a reference voltage source that is connected with the comparator, a timer and a calculating unit; the timer is used for recording the time interval from the time that the capacitor starts discharging under the fully-charged state to the time that the comparator detects that the capacitor voltage is equal to the voltage of the reference voltage source; the calculating unit is used to calculate the voltage value of a power supply according to the voltage value of the reference voltage source, the time interval, the resistance of the resistor and the capacitance of the capacitor. With the adoption of the power voltage measuring device, the temperature and voltage measuring function is realized with one module of a hardware; meanwhile, the structure is simple and compact, and the cost is low.

Description

Technical field [0001] The present invention relates to the field of electronic control, in particular to a device for measuring power supply voltage, and a temperature detection device and temperature controller containing the device. Background technique [0002] At present, with the development of chip technology, its cost is getting lower and lower, and its performance is getting more and more powerful, which makes its applications ubiquitous, in various fields, for example, motor control, consumer electronics, game equipment, industrial control and automation , And white goods. [0003] figure 1 It is a device set on a chip. The device can be used for control equipment, specifically a thermostat. The device includes a temperature measurement module 11 and a power supply voltage indicator 12, the temperature measurement module 11 and The power supply voltage indicator 12 serves as a different module to complete their respective functions. The temperature measurement module 11...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01K7/22
Inventor 涂礼晖曹亮楚萃锟
Owner EMERSON ELECTRIC CO